ST Multiple application platform based on STR750FV2 User Manual

UM0442

User manual

Multiple application platform based on STR750FV2

Introduction

The system described in this user manual, Multiple application platform based on

STR750FV2 - ARM7TDMI-S ™ 32-Bit MCU, is a development board implementing a very high number of powerful features.

Figure 1 below shows the main characteristics of the system which can be connected to

other systems through the BSPI (Buffered SPI) connector and the I

2

C connector. Advanced networking is also allowed by the new ZigBee

®

connector for radio link communication at

2.4 GHz. Standard serial connectivity can be established using the CAN connector (both

250 Kbps and 1 Mbps as maximum bus speed are supported), the UART connector (linked to the peripheral UART1 of the STR750FV2) and the mini-USB connector useful for data communication with a PC as well as supplying the system.

Another important feature is the 34-pin standard motor control connector and the possibility to switch between four different power sources.

Two on-board sensors are also available (inertial sensor and analog temperature sensor) in order to start with a wide application range.

Figure 1.

Multiple application platform board based on STR750FV2

(STEVAL-IFS008V2)

August 2007 Rev 1 1/33 www.st.com

5

6

7

3

4

1

2

Contents

Contents

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Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Board architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

List of features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Hardware configuration and functionality . . . . . . . . . . . . . . . . . . . . . . . 5

4.1

Power source selector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4.2

Battery pack power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4.2.1

How to charge the battery pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.3

External 5 V power sourcer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

4.4

Mini-USB connector power source . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.5

Standard power supply connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.6

Memory boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4.7

STR750FV2 pin-out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.8

The motor control connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.9

Mini-USB connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

4.10

JTAG connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.11

On-board sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4.12

The ZigBee

® ‚ connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

4.13

Graphic LCD strip-line connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

4.14

CAN connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4.15

UART connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4.16

I

2

C and BSPI connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

4.17

ADC connector and potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.18

User LEDs and push buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Board schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

List of jumpers and selectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

2/33

UM0442

List of figures

List of figures

Figure 1.

Multiple application platform board based on STR750FV2 (STEVAL-IFS008V2) . . . . . . . . 1

Figure 2.

System layout and architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3.

Power source selector and jumper legend . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 4.

The selector S7 allows the STR750-MAP to be supplied from the battery pack . . . . . . . . . 6

Figure 5.

Selectors configuration to recharge the battery pack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 6.

STR750FV2 pin-out and EXT power source locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 7.

Memory boot selectors and example of configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 8.

Pin numbering in each connector composing the pin-out of the STR750FV2 . . . . . . . . . . 10

Figure 9.

34-pin motor control connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 10.

Standard Mini-USB connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 11.

The JTAG connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 12.

The LIS3LV02DQ (on the left) and the STLM20 (on the right) packages . . . . . . . . . . . . . . 14

Figure 13.

A female strip-line is used as LCD socket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 14.

DB9 male connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 15.

S6 selector, this configuration allows RTS functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 16.

Position of jumpers in order to choose the LIS3LV02DQ accelerometer . . . . . . . . . . . . . . 19

Figure 17.

The I

2

C bus schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 18.

The ADC connector schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 19.

The ADC potentiometer schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 20.

User LEDs schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 21.

General purpose push buttons schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 22.

Main board schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 23.

Communication interfaces schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 24.

LCD schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 25.

Motor control connector schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Figure 26.

MEMS accelerometer and temperature sensor schematics . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 27.

Battery charger unit, standard Power supply and power source selector schematics . . . . 27

3/33

Definitions

1 Definitions

The list of definitions used in this user manual are as follows:

●

●

●

●

STR750-MAP: Multiple Application Platform based on STR750FV2.

ARM7TDMI-S ™ : 32-Bit RISC CPU with 16/32 bit instructions

MEMS: Micro Electro Mechanical System

MC: Motor Control

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4/33

Figure 2 shows the board layout and architecture overview. The layout underlines the most

important components and parts of the system.

Figure 2.

System layout and architecture

CAN UART

BSPI

MiniUSB

9 Vdc

ZigBee

®

I

2

C STR750FV2

Power source selector

Sensors

4 x ADC

Potentiometer

Motor control JTAG

Graphic LCD

6 x LEDs

2 x push buttons

Reset

Wake-up

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3 List of features

List of features

The STR750-MAP is a system designed for a wide spectrum of high-end applications.

Appreciable and innovative features are the new 12-pin socket for ZigBee

®

modules and the possibility to choose among four different power sources.

The board mounts the STR750FV2 microcontroller in LQFP100, 14x14 mm package. The pin-out of the STR750FV2 microcontroller is available to the users and placed around the microcontroller itself.

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

●

The list of features of the STR750-MAP board is as follows:

STR750FV2 ARM7TDMI-S ™ 32-Bit MCU

ZigBee

®

socket for module based on SN260

34-pin Motor Control connector

Mini-USB connector both for data and for board supply

Battery pack connector for rechargeable battery

9÷12 Vdc standard power supply connector

External 5 V power source to plug in the STR750FV2 pin-out

3-axis MEMS accelerometer LIS3LV02DQ

Analog temperature sensor STLM20

Graphic LCD strip line connector

DB9 standard male CAN connector

DB9 standard male RS232 connector

JTAG connector for programming and debugging capabilities

Reset and Wake-up push buttons

2 switches for memory boot capabilities

I

2

C connector

BSPI connector

6 user LEDs

Potentiometer on ADC channel

2 general purpose push buttons

Each of this features or functionalities is fully explained in this user manual.

4

4.1

Hardware configuration and functionality

Power source selector

The STR750-MAP evaluation board is provided with a power source selector that allows the user to choose between four different ways to power the board including the possibility to recharge the external battery pack while the board is powered through the standard power 9

Vdc power supply or the mini-USB connector.

5/33

Hardware configuration and functionality UM0442

●

●

The configuration of the power source selector as appears in the silkscreen (consider the following abbreviations as a legend for the picture below) is as follows:

● BAT: the battery pack is selected as power source. To do this, close the related jumper and connect the battery pack by plugging in its connector as appropriate (see

Section 4.2: Battery pack power source

).

EXT: the external 5 V power source is selected as power source.

USB: plug in this jumper once the board is connected to a computer through the mini-USB connector in the upper side of the board.

● PWR: the standard 9 Vdc power connector is chosen and a voltage regulator

(L7805AB) provides the 5 V supply to all the components in the board.

Figure 3.

Power source selector and jumper legend

4.2

It is strongly recommended to not select more than one power source at a time. This is to prevent possible power source failures, with the consequence to propagate these failures to the board components.

Battery pack power source

The battery pack is selected by closing the appropriate jumper as shown in the previous section.

In order to supply the STR750-MAP the following two steps are required:

● Plug the battery pack connector onto the STR750-MAP, using the 2-pin connector named BATTERY in the board silkscreen.

● Configure the 3-pin strip-line selector S7 as follows: close the middle point of the S7 selector with the point 3 (left side of the S7). In this way, the battery pack is linked to the L6920D step-up converter in order to furnish the right voltage to all the components

(see Figure 4 ).

Figure 4.

The selector S7 allows the STR750-MAP to be supplied from the battery pack

6/33

As an alert feature, an LED is placed to give a warning if a low battery level occurs (LED

D10).

The two types of batteries that can be connected to the board to allow all features are the graphite anode single cell Li-Ion or Li-Polymer. The low threshold voltage detector is fixed at

2.7 V (considering the use of a battery pack at typically 3.7 V/1360 mAh).

UM0442

4.2.1

Hardware configuration and functionality

When another power source (USB, 9 Vdc) is selected, it is possible to recharge the battery pack. The L6924D battery charger system performs this task.

How to charge the battery pack

It is possible to charge a battery pack connected to the STR750-MAP while the board is powered through the power supply or the USB connector. Although the first method is outlined, the procedure to implement the charge phase is the same for both ways.

First of all, the STR750-MAP needs to be supplied. For example, plug in the 9÷12 Vdc power supply connector (closing the appropriate jumper).

As a second step, connect the battery pack to the connector, without closing the correspondent jumper in the power source selector.

To set up the recharging process, follow these steps:

1.

Close the selector S7 in the position 1-2: this is to connect the battery to the recharging circuit.

2. Close the selector S8 in the position 2-3: this is in order to select 5 V standard power source.

3. Close the selector S9 in the position 1-2: by doing this, the L6920 and its circuitry is switched off in order to save power.

Figure 5.

Selectors configuration to recharge the battery pack

4.3 External 5 V power sourcer

It is possible to plug in an external 5 V power source by closing the jumper EXT in the power source selector.

This feature makes the STR750-MAP highly versatile. Since this power source has no specific connectors, the only way to furnish 5 V to the STR750-MAP, comes directly from the

STR750FV2 pin-out placed around the microcontroller itself.

In this way, the user can make his own interface board or connect it directly to the microcontroller's pins.

Take care to follow these simple steps: the external 5 V can operate only if the EXT (see

Figure 3 ) jumper is closed. After this, the 26

th

pin of the connectors J1, J2, J3 and J4 placed

around the microcontroller (see the following Figure 6

), is available to receive the external supply. Pay attention when connecting boards outputting 600 mA as maximum current in order to preserve the STR750-MAP functionalities from damage.

7/33

Hardware configuration and functionality

Figure 6.

STR750FV2 pin-out and EXT power source locations

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4.4

4.5

Mini-USB connector power source

In order to use the mini-USB connector as power source, close the related jumper as described in

Section 4.1: Power source selector on page 5

(be sure that the other jumpers are open) and then plug the mini-USB cable onto the connector.

This feature can have an impact on the battery charge capabilities of the STR750-MAP as described in

Section 4.2

.

The USB unit integrates a 48 MHz clock for data management and a USBLC6-2P6 application specific device for very low capacitance ESD protection circuit (see the schematics in

Figure 23

).

Standard power supply connector

The standard power supply connector is named as PWR in the board silkscreen and, once closed, the STR750-MAP is powered using both laboratory equipment and a common 9÷12

Vdc power supply source.

This power source also impacts the battery charge capabilities of the board.

8/33

The STR750-MAP evaluation board allows the user to run the STR750FV2 choosing between 4 memory modes in order to perform the boot phase.

To make the appropriate choice for your application, refer to the boot table printed onto the

board silkscreen. This table is given here with the associated selectors (see Table 1 ).

SW1 corresponds to Boot1/CS2 in the schematics, on the right side (boundary part of the board). SW2 corresponds to Boot0 pin in the microcontroller and in the schematics (refer to the related schematics in

Figure 22

).

UM0442 Hardware configuration and functionality

Following the STR750FV2 datasheet, the boot table given in

Table 1 and Figure 7

could be useful to clarify the layout.

Table 1.

Boot table

Memory model

FLASH

SRAM

MEM

SMI

SW2 - SW1

0–0

0–1

1–0

1-1

In

Table 1

above, the "0-0" configuration corresponds to the boot from the embedded

FLASH memory sector "B0F0" mapped at 0h. The configuration "0-1" corresponds to the embedded SRAM mapped at 0h. The configuration "1-0" corresponds to the boot from the system memory mapped at 0h. Finally the configuration "1-1" corresponds to the boot from external SMI bank 0 mapped at 0h.

Figure 7.

Memory boot selectors and example of configuration

The configuration chosen here corresponds to the MEM memory model.

To enhance debugging features as well as the possibility to easily connect a secondary board, the whole pin-out of the microcontroller is available to the users and located around the microcontroller.

The pin-out is arranged around the microcontroller with 4 connectors placed one per side.

Since the LQFP100 package is used, each connector is composed of 26 pins with the last pin as a spare for the STR750FV2 pin-out.

The 26 th

of each connector is used as 5 V external power source when the jumper EXT in

the power source selector is closed (see Section 4.3

for details).

To facilitate the use of this pin-out, the pin correspondence is printed close to each connector.

Table 2 and Figure 8

show the numbering for the connector related to pin 1 to 25 (connector

JE1 in the layout). The same numbering is used for the other connectors, where the last pin is connected for the external 5 V supply.

Table 2 describes the connector/pin-out

association.

9/33

Hardware configuration and functionality

Table 2.

JE1

JE2

JE3

JE4

Connector to MCU pins correspondence table

Connector name STR750FV2 pin correspondence

1÷25 (26 th

pin used for external 5 V)

26÷50 (26 th

pin used for external 5 V)

51÷75 (26 th

pin used for external 5 V)

76÷100 (26 th

pin used for external 5 V)

Figure 8.

Pin numbering in each connector composing the pin-out of the

STR750FV2

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4.8

10/33

The motor control connector

The STR750FV2 is an MCU suited for Motor Control applications since it embeds timers which can be used for dead time generation and edge/center aligned waveform emergency stop. This feature makes it ideal for induction and brushless DC motor control.

The STR750-MAP is provided with a 34-pin fully featured connector (J11 in the board layout) dedicated to these kinds of applications.

Table 3 below lists the association between each connector pin and the related functionality

and microcontroller pin correspondence.

Table 3.

Motor control connector and STR750FV2 pins correspondence

Connector pin Name Function STR750FV2 pin

7

8

5

6

3

4

1

2

9

10

11

12

13

MC_EMGCY

None

PWM_UH

None

PWM_UL

None

PWM_VH

None

PWM_VL

None

PWM_WH

None

PWM_WL

Emergency stop

Ground

High side PWM for U phase

Ground

Low side PWM for U phase

Ground

High side PWM for V phase

Ground

Low side PWM for V phase

Ground

High side PWM for W phase

Ground

Low side PWM for W phase

209

-

208

-

80

-

109

-

207

-

206

-

205

UM0442 Hardware configuration and functionality

Table 3.

Motor control connector and STR750FV2 pins correspondence

Connector pin Name Function STR750FV2 pin

27

31

32

33

34

28

29

30

21

22

23

24

25

26

17

18

19

20

14

15

16 None

None

None

None

None

VCC 5 V

+3V3

None

None

Bus voltage

Current phase A

Ground

Current phase B

Ground

Current phase C

Ground

NTC bypass relay

Ground

Dissipation brake PWM

Ground

5 V

Heat sink temperature

PFC (Power Factor Corrector) synchronization

3.3 V

PFC PWM

Ground

Encoder A

Ground

Encoder B

Encoder index

3

-

33

1

-

30

-

204

-

100

-

-

29

27

108

-

106

-

104

-

31

In applications where the 5 V supply comes from the motor control connector, all the jumpers of the power selector must be open.

Of course, if the 5 V is furnished from the STR750-MAP to the MC, choose the appropriate supply from the power supply selector by closing the corresponding source.

Pay particular attention also when using jumper J15. It allows the user to provide 3.3 V to the MC connector, when it is closed (jumper J15 is open by default). In any case, 3.3 V cannot be supplied by the motor control connector.

Figure 9.

34-pin motor control connector

11/33

Hardware configuration and functionality UM0442

The mini-USB connector provides both data management features as well as board supply operations (board supply and battery pack recharge), see

Figure 10 and Table 4

.

Figure 10.

Standard Mini-USB connector

12/33

Table 4.

Pins and signals correspondence for the Mini-USB connector

Pin number Name Colour Notes

1

2

3

4

5

VBus

D-

D+

ID

GND

Red

White

Green

-

Black

Power

Data -

Data +

Type A – GND/Type B - NC

Ground

This standard connector is defined as part of the USB-OTG (USB On The Go) enhancement. It features a single connector type (A or B) and peer-to-peer operations.

The configuration present on the STR750-MAP is Type B, as pin 4 is not connected (NC in the table).

The USB-OTG is a supplement to the USB 2.0 (or USB 1.0) specifications that allow USB devices to have more flexibility in managing USB connections.

As known, the standard USB (USB 1.1/2.0) uses Master/Slave architecture. A USB host acts as a Master and a USB peripheral (aka USB Device) acts as a Slave. Only the USB host can schedule the configuration and data transfers over the link, while the USB peripherals cannot initiate data transfers. They only respond to instructions given by a Host.

The USB-OTG compatible devices are able to initiate the session, control the connection and exchange Host/Peripheral roles between each other.

With this new architecture, two new protocols are introduced: SRP (Session Request

Protocol) and HNP (Host Negotiation Protocol).

Two new classes of devices are defined: OTG A-device and OTG B-device. This terminology defines which side supplies power (VBUS) to the link. The OTG A-device is a supplier and an OTG B-device (our case) is a consumer. The default link configuration is that A-device is Host and B-device is a Peripheral (this may be reversed later by using HNP).

These devices are fully backward compliant with USB 1.1/2.0 and behave as standard USB

Hosts or Peripherals when connected to standard (no OTG) USB devices.

UM0442 Hardware configuration and functionality

The USB-OTG standard defines only one-to-one connection. Contrary to the standard USB there are no USB Hubs defined by the USB-OTG. Connecting the USB hub between two

OTG devices leads to losing all USB-OTG capabilities.

To allow enabling of debug features as well as programming capabilities, the STR750-MAP is equipped with a standard JTAG connector.

Figure 11

below shows how the pins and the corresponding signals are placed in the JTAG connector.

Figure 11.

The JTAG connector

As described in the features list of the board, the STR750-MAP is provided with one 3-axis digital MEMS accelerometer (the LIS3LV02DQ) and one analog temperature sensor (the

STLM20).

Both sensors are mounted with their package size (QFN28 and UDFN4 package respectively).

While the temperature sensor provides only the analog output (connected to the ADC

I channel 0, pin number 2 in the microcontroller pin-out), the accelerometer could output both

2

C and SPI digital serial output. As a design choice, the STR750-MAP allows the on-board accelerometer to communicate with the STR750FV2 using only the I

2

C serial bus (the CS pin is fixed at 3.3 V).

The board offers the possibility to disconnect this I

2

C bus from the accelerometer, allowing the microcontroller to communicate with external peripherals using this bus at 3.3 V as Vcc with both standard and fast protocol variants.

To manage these settings, refer to

Section 4.16: I2C and BSPI connectors on page 18

.

The packages are described in

Figure 12

, where on the left side is the QFN28 package of the accelerometer, and on the right side is the UDFN4 package of the temperature sensor.

Refer to the device datasheet in the Reference section for further details.

13/33

Hardware configuration and functionality UM0442

Figure 12.

The LIS3LV02DQ (on the left) and the STLM20 (on the right) packages

14/33

For the electrical connections refer to the schematics (see

Figure 26 on page 26 ).

ZigBee

®

connector

The ZigBee

®

connector is designed as two adjacent female connectors, each composed of six pins. It is made to host the ZigBee

®

module based on SN260 and adapter in the

STR750-MAP.

This socket allows the access to the EZSP (Ember Zetanet Serial Protocol).

To localize the connector position inside the board, see the board architecture in

Section 3:

List of features on page 5 .

The socket description is defined as follows:

Table 5

and

Table 6 show the pin-out of the

connector (ZigBee

®

module interface connectors J8 and J9), while

Table 7 illustrates pin

functionality.

By means of the ZigBee

®

connector, the EZSP may be accessed through the SPI protocol.

Table 5 and Table 6 show the connectors J8 and J9.

Table 5.

Connector J8 of the ZigBee

®

socket

Signal name

VBRD

MOSI

MISO

SCLK nSSEL

GND

Pin no

1

2

3

4

5

6

Table 6.

Connector J9 of the ZigBee

®

socket

Signal name

VBRD

HOST_INT

WAKE

RSTB

Pin no

1

2

3

4

UM0442

Table 6.

Hardware configuration and functionality

Connector J9 of the ZigBee

®

socket (continued)

Signal name Pin no

GND

GND

5

6

J8.1

J8.2

J8.3

J8.4

J8.5

J8.6

J9.1

J9.2

J9.3

J9.4

Table 7.

Pin no

Signal description of the ZigBee

®

socket

Signal name Direction

(1)

VBRD Power

Description

3.3 V power supply for ZigBee

®

module

MOSI (P0.18)

MISO (P0.17)

SCLK (P0.16) nSSEL (P0.25)

GND

VBRD

HOST_INT (P1.05)

WAKE (P0.24)

RSTB (P2.03)

Input

Output

Input

Input

Power

Power

Output

Input

Input

SPI data, Master Out/Slave In (from STR750FV2 to SN260)

SPI data, Master In/Slave Out (from SN260 to STR750FV2)

SPI clock (STR750FV2 to SN260)

Active low SPI slave select (STR750FV2 to SN260)

Ground connection

3.3 V power supply for ZigBee

®

module

Host interrupt (from SN260 to STR750FV2)

Wake interrupt (from STR750FV2 to SN260)

Active low chip reset (internal pull-up)

J9.5

GND Power Ground connection

J9.6

GND Power

1.

With respect to the ZigBee

®

module based on SN260 with adapter

Ground connection

The HOST_INT signal is at 3.3 V pull-up through a 4.7 k

Ω

resistor (R49) in series with a 0

Ω resistor (R50). In this way the HOST_INT does not bounce in an unknown state if the

SN260 is in reset.

In each case the pull-up can be excluded by unsoldering the R50 resistor.

4.13 Graphic LCD strip-line connector

A standard 20-pin strip-line is dedicated to the control of a graphic 128x64 LCD.

The board is designed to host the LCD in the applications where it is needed, with the possibility to remove it when unnecessary, in order to save power.

Table 8 gives pin correspondence and

Figure 13

shows pin arrangement and organization.

Table 8.

LCD socket pin description

Pin no Name

3

4

2

1 GND

Vcc 5 V

V0

D/I

STR750FV2 pin

-

-

-

219

15/33

Hardware configuration and functionality

Table 8.

LCD socket pin description (continued)

Pin no Name

17

18

19

20

12

13

14

15

16

10

11

8

9

5

6

7

DB5

DB6

DB7

CS1

CS2 notRST

Vout

A

K

RnotW

E

DB0

DB1

DB2

DB3

DB4

Figure 13.

A female strip-line is used as LCD socket

UM0442

STR750FV2 pin

59

-

-

-

215

216

217

201

202

200

218

210

211

212

213

214

16/33

The board is equipped with a standard DB9 male connector to enhance networking capabilities, especially in industrial and factory automation environments.

The physical layer of the CAN protocol is implemented through the L9616 transceiver. It allows the peripheral to reach standard communication speeds (up to 250 Kbps and up to 1

Mbps) which can be done by setting the selector S5 (located close to the CAN connector, see

Figure 2

) as appropriate. Taking the middle point of this selector as a reference, and closing this one with pin number 3 (0 in the board silkscreen), the device runs at 1 Mbps as maximum speed. Closing the middle point of S5 with pin number 1 in the layout (1 in the board silkscreen), the communication speed is limited to 250 Kbps.

Independently of the speed you select, you must close jumper JP12 to connect the termination resistor, in order to close the communication line on the STR750FV2 side.

Jumpers JP10 and JP11 also must be closed to allow communication. They connect the Tx and Rx pins of the transceiver with pins 64 and 63 of the microcontroller respectively, linking the peripheral to the physical layer of the communication protocol.

UM0442 Hardware configuration and functionality

Refer to

Figure 14

and

Table 9

for further details of the connector.

Figure 14.

DB9 male connector

Table 9.

Pin numbering for the CAN connector

Pin number

7

8

5

6

9

3

4

1

2

Function

NC

NC

GND

CAN_L

NC

NC

NC

CAN_H

GND

Other networking capabilities are offered by the UART connector on the board. It is linked to the UART1 peripheral of the microcontroller through a ST202EC transceiver, using pins 11,

16 and 17 of the microcontroller itself, respectively for RTS, Tx and Rx capabilities.

The jumper JP19 near the transceiver, once closed, enables the CTS functionality. If open the corresponding shared pin of the microcontroller (pin 15) can be used by the EXT connector.

Before having a look at the pin correspondence Table 10 (the connector is a DB9 male as

the one used for CAN), a brief description of the S6 selector is needed.

If you close between the middle point and point 1 (upper side, near the connector), you enable the RTS functionality, at the same time the jumper JP13 must be closed. Elsewhere, if you close the middle pin with pin 3 you enable the NULL Modem mode (at the same time jumper JP13 must be opened).

17/33

Hardware configuration and functionality

Table 10.

Pin numbering for the UART connector

Pin number

6

7

4

5

8

9

1

2

3

Function

-

Rx1

Tx1

-

GND

-

Tx2

Rx2

NC

Figure 15.

S6 selector, this configuration allows RTS functionality

UM0442

4.16 I

2

C and BSPI connectors

Both the I

2

C and BSPI connectors are shared with other devices placed on the board, but they are useful in order to allow on-system communication capabilities for the STR750-MAP.

The I

2

C peripheral bus of the microcontroller shares the pin between the 3-axis accelerometer and the connector for external devices.

Starting from the microcontroller pin out, pins 29 and 30, SDA and SCL respectively, are connected to the middle points of two 3-pin strip-line selectors, S2 and S1 respectively. If both these selectors are closed between the middle point and the point 3, we connect the microcontroller to the I

2

C bus of the accelerometer sensor. If we close between their middle point and point 1, the microcontroller is connected to the external I

2

C connector, allowing communication with an external device respecting the I

2

C standard protocol specifications.

The left diagram in Figure 16

shows the configuration to select the accelerometer on the I

2

C bus. The diagram on the right is extracted from the schematic.

18/33

UM0442 Hardware configuration and functionality

Figure 16.

Position of jumpers in order to choose the LIS3LV02DQ accelerometer

Figure 17.

The I

2

C bus schematic

In order to allow capabilities such as system interconnectivity, the BSPI (Buffered SPI) connector is available to the users. It is located adjacent to the mini-USB connector (see

Figure 2 for the component placement) and the pin correspondance is described in the

related schematics (see Figure 22 ).

4.17 ADC connector and potentiometer

The STR750-MAP offers the possibility to connect analog devices and/or signal generators, directly to the ADC peripheral by using a 4-input ADC connector.

These input channels are provided with a RC filter with parameters calculated using the

lowest conversion time allowed by the STR750FV2: 3.75 µs. Figure 18 shows the schematic

of the connector and the corresponding pin-out.

19/33

Hardware configuration and functionality

Figure 18.

The ADC connector schematic

UM0442

The ADC peripheral channels used for this connector are: 2, 13, 14 and 15, connected to pins P0.12, P1.12, P1.13 and P1.14 respectively.

The dedicated potentiometer (useful to test the peripheral features) is also present in the

STR750-MAP layout adjacent to the connector. It is attached to the ADC channel 12 (pin

P1.11): see

Figure 19

below.

Figure 19.

The ADC potentiometer schematic

4.18 User LEDs and push buttons

As well as the ADC connector and potentiometer, debugging and testing capabilities of the user specific applications are also supported by 6 on-board user LEDs and 2 push buttons.

Each LED is accessible by connecting the correspondent jumper which is to minimize the load effects on the other peripherals that use the same pin-out (i.e. the user LEDs attached to pins P0.22 and P0.23 share this port with the UART connector circuit). These jumpers are

given in Figure 20 and are also illustrated in the board silkscreen.

Figure 20.

User LEDs schematic

20/33

UM0442 Hardware configuration and functionality

The two push buttons are attached to pins P0.10 and P1.07 (external interrupt 4 and 8

respectively), see Figure 21 .

Figure 21.

General purpose push buttons schematic

21/33

Board schematics

Figure 22.

Main board schematic

3 1

UM0442

1

1

22/33

UM0442

Figure 23.

Communication interfaces schematic

Board schematics iB iB min min USB_ USB_

10 11

10 11

®

16

VCC GND

15

23/33

Board schematics

Figure 24.

LCD schematic

UM0442

24/33

UM0442

Figure 25.

Motor control connector schematic

Board schematics

25/33

Board schematics

Figure 26.

MEMS accelerometer and temperature sensor schematics

UM0442

26/33

UM0442 Board schematics

Figure 27.

Battery charger unit, standard Power supply and power source selector schematics

2

3

1

2

3

1

8

TH

12

Vref

GND g Vopr

9

6

SD

7 1 2

2

GND

2

GND

1

27/33

List of jumpers and selectors

6 List of jumpers and selectors

UM0442

Table 11.

List of jumpers and selectors

Type Name Function

3-pin strip-line

3-pin strip-line

3-pin strip-line

3-pin strip-line

4-pin slide

Push button

Push button

Jumper

Jumper

Jumper

Jumper

Jumper

Jumper

Push button

Push button

Jumper

10-pin strip-line

Potentiometer

1pin connector

1pin connector

1pin connector

1pin connector

Jumper

Jumper

Jumper

3-pin strip-line

Jumper

3-pin strip-line

Jumper

Jumper

Jumper

Jumper

TP2

TP3

TP4

JP10

JP11

JP12

S3

S4

J6

JP9

R30

TP1

S5

JP13

S6

JP19

JP15

JP16

JP17

JP1

JP2

JP3

JP4

JP5

JP6

SW1

SW2

S1

S2

SW4

SW5

SW3

STR750FV2 boot

STR750FV2 boot

I

2

C switch

I

2

C switch

BSPI switch

STR750FV2 reset

STR750FV2 wakeup

User LED

User LED

User LED

User LED

User LED

User LED

Push button

Push button

JTAG

External ADC

Potentiometer

Test point

Test point

Test point

Test point

CAN

CAN

Termination

ASC pin select

UART1

UART1

UART1

Power

USB

EXT

Description

GND/3.3 V selector

GND/3.3 V selector

MEMS/ext. SCL switch

MEMS/ext. SDA switch

EXT/ext. BSPI switch

Device reset from user

Wake up from user

Connect user LED D1

Connect user LED D2

Connect user LED D3

Connect user LED D4

Connect user LED D5

Connect user LED D6

User push button

User push button

JTAG reset signal

Enable the selected channel

Pot. on ADC channel 12

Ground point

Ground point

3.3 V point

3.3 V point

Connect L9616 Rx line

Connect L9616 Tx line

R38 to close the line

Choose 250 kbps/1 Mbps

NULL Modem/RTS

NULL Modem/RTS

CTS/EXT pin sharing

Connect standard supply

Connect USB as supply

Connect EXT as supply

STR750FV2 pins

-

-

-

64

63

-

28

88

59

1,93,92,26

34

-

15

-

-

-

-

-

-

27

4

30

29

76,77,78,79

59

60

94

68

8

28

11

15

28/33

UM0442 List of jumpers and selectors

Table 11.

List of jumpers and selectors (continued)

Type

Jumper

Male connector

Jumper

3-pin strip-line

Jumper

3-pin strip-line

3-pin strip-line

Jumper

Jumper

Jumper

Name

JP18

J14

J12

S7

JP14

S8

S9

J13

J15

JP8

Function

Battery

Power supply

Battery pack

Battery

Battery

Battery

Battery

Battery

Motor control

Asynchronous reset

Description

Li/Ion Battery pack

9÷12 Vdc power supply

Connect battery to board

Recharge/supply switch

Connect L6924 to source

Source switch USB/Power

On/Off Battery pack

Closed enable L6924

To supply 3.3V to MC conn.

Reset AHB System each APB peripheral

STR750FV2 pins

-

-

-

-

-

-

-

-

-

58 - 59

Table 12.

BOM (Bill Of Material)

ID Qty Part reference Value

USB_miniB 1 1 CN1

2 14

3

4 10

5

4

1

C1,C2,C11,C13,

C19,C22,

C23,C24,

C25,C26,C27,C30,

C38,C47

C3,C4,C5,C6

C7,C14,C16,C17,

C20,C51,

C53,C55,C56,C18

C8

6 6

C10,C36,C50,C52,

C54,C57

100 nF

22 pF

10 nF

33 nF

10 µF

7

8

9

10 1

1

3

5

C12,C15,C41,C43,

C45

C21

C35,C39,C40

C37

1 µF

4.7 nF

1 nF

0.1 µF

11 2

12 1

C42,C44

C46

47 µF

3.3 nF

Device type

Mini-USB connector

Manufacturer

Molex

16 V - SMD

Tantalum

Capacitor

35 V - SMD

Tantalum

Capacitor

25 V - SMD

Tantalum

Capacitor any

AVX any any any

AVX any any any any

AVX

Order code

54819-0578

TPSB106K016R0800

THJB105K035

TPSD476K025R0250

29/33

List of jumpers and selectors

Table 12.

BOM (Bill Of Material) (continued)

ID Qty Part reference Value Device type

13 2

24 1

C48, C49

14 3

15 3

D1,D2,D3

D4,D5,D6

16 4 D10, D11,D12, D7

17 2 D14,D16

18 1

19 4

D13

R1,R2,R14,R49

20

21

22

23

7

12

2

1

R3,R4,R5,R6,R7,

R8,R70

R9,R13,R17,R19,

R21,R23,R31,R57,

R58,R60,R62,R64

R10,R12

R11

R30

220 µF

LED

LED

LED

LED diode

4.7

k Ω

330 Ω

1 k

Ω

100 k Ω

100 Ω

10 k Ω

16 V - SMD

Tantalum

Capacitor

SMD - blue

SMD – green

SMD - red

SMD - yellow

Trimmer–

2.54 mm

25 13

26 2

R15,R24,R25,R26,

R27,R28,R29,R32,

R33,R34,R35,R37,

R40

R16, R39

27 3

28 2

29 1

30 2

31 1

32 1

33 1

R18,R50,R45

R36, R69

R38

R41, R42

R43

R44

R51

34 1 R52

10 k Ω

1 M Ω

0

Ω

300

Ω

120 Ω

22 Ω

36 k Ω

1.5

k

Ω

10

Ω

20 k Ω

Trimmer-

2.54 mm

35 2

36 2

37 1

38 1

39 1

40 1

R56, R67

R59, R65

R61

R63

R66

R68

3.3 k Ω

470

Ω

5.2 M

Ω

3.3 M Ω

24 k Ω

200 k

Ω

Manufacturer any any any

Bourns any any any any any any any any any

Bourns any any any any any any

AVX

Avago

Avago

Avago

Avago

Philips any any

UM0442

Order code

TPSV227K016R0075

HSMN-C150

HSMG-C150

HSMH-C150

HSMY-C150

436-7341

3386F1103T LF

3296W 20k

30/33

UM0442 List of jumpers and selectors

Table 12.

BOM (Bill Of Material) (continued)

ID Qty Part reference Value Device type Manufacturer Order code

41

42

43

44

45

1

1

2

2

1

J7

J11

P1, P2

L2, L3

L1

46 4 JE1, JE2, JE3, JE4

20-pin male connector

34-pin male connector

JTAG connector

MC connector

DB9 male connector CAN, UART

10

10

µH

µH header

180 mA inductor

1.4 A inductor

26-pin (2x13), standard male

2.54 mm

47 19

JP1,JP2,JP3,JP4,

JP5,JP6,JP8,JP10,

JP1,JP1,

JP13,JP14,JP15,

JP16,JP17,JP18,

JP19,J6,J13 header

2-pin standard male 2.54 mm

48

49

50

51

52

53

54

55

56

57

1

9

Y3

SW1,SW2,S1,S2,

S5,S6,S7,S8,S9

58 4 SW3,SW5,S3,S4

59

60

2

1

1

4

2

1

1

1

1

1

J1, J12

JP7

JP9

J2,J3,J4,J5

J8, J9

J14

Y1

Y2

U1

U4 header header header header header connector oscillator oscillator oscillator header

STR750FV2T6

L9616D

Tyco

Tyco any

Epcos

Wurth any any

609-2027

609-3427

RS code: 191-0122

7445510

2-pin male connector

4-pin male connector

8-pin (2x4), standard male

2.54 mm

1-pin standard male

2-pin standard female

2.54 mm

Standard power supply connector

32.768 KHz oscillator

Tyco (AMP)

Tyco (AMP) any any any

280370-1

280371-1

RS code: 286-8779

RS code: 547-6856

4 MHz oscillator

48 MHz

3-pin standard male 2.54 mm

Fox Electronics

Epson any

Push button APEM Components

LQFP100

(14x14 mm)

SO-8

STMicroelectronics

STMicroelectronics

FOXSD/040

SG8002CAPCB48MHZ

DTS61K

STR750FV2T6

L9616D

31/33

Revision history UM0442

Table 12.

BOM (Bill Of Material) (continued)

ID Qty Part reference Value

61 1

62 1

63 1

64 1

65 1

66 1

67 1

68 1

69 1

70 1

71 1

72 1

IC3

U9

U8

U10

U11

U5

U6

U7

IC1

IC2

U13

Q1

STLM20DD9F

STM1061N27WX6F

L6924D

STM1001TWX6F

USBLC6-2P6

ST202ECD

L6920D

STS10PF30L

L7805ABD2T-TR

LD1085D2M33R

LIS3LV02DQ

BC846AL

(MMBT2222)

Device type Manufacturer any

Order code

UDFN 4

SOT23-3

VFQFPN16 STMicroelectronics

SOT23-3 STMicroelectronics

SOT-666

STMicroelectronics STLM20DD9F

STMicroelectronics STM1061N27WX6F

STMicroelectronics

L6924D

STM1001TWX6F

USBLC6-2P6

SOP-16

TSSOP8

SO-8

D

2

PAK

D

2

PAK/A

QFPN-28

STMicroelectronics

STMicroelectronics

STMicroelectronics

STMicroelectronics

STMicroelectronics

STMicroelectronics

ST202ECD

L6920D

STS10PF30L

L7805ABD2T-TR

LD1085D2M33R

LIS3LV02DQ

73 1 U12 header

20-pin standard female

2.54 mm

Table 13.

Revision history

Date Revision

30-Aug-2007 1 First issue

Changes

32/33

UM0442

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