ST7 serial test controller programming

AN987
APPLICATION NOTE
ST7 SERIAL TEST CONTROLLER PROGRAMMING
by Microcontroller Division Applications
INTRODUCTION
This application note describes:
– The advantages of Serial Test Controller Programming (STCP) vs. programming using an
EPROM programming board (EPB) (see Section 2.1).
– How to implement Serial Test Controller Programming targeting most of the ST7 general purpose microcontrollers (see Section 2.2). These devices include all parts supported by the
ST7 starter kits and ST7 EPBs in the MDT1, MDT2 and MDT4 tool families (see the supported device list in APPENDIX 1).
Note: In this application note, the term “programming tool” refers to either the EPBs or the
starter kits.
1 PROGRAMMING TECHNIQUES
There are two possible ways of programming an ST7 device:
■
Using a programming tool. In this case, the device is first plugged on the programming board
and then programmed. Then, the part is soldered or plugged into a socket on the user board.
This can be done using any of the following ST7 programming tools:
– ST7 Starter Kit
– ST7 EPB (EPROM Programming Board)
– ST7 Gang Programmer
For further details about the above tools, please refer to the user manual supplied with these
devices.
■
Using a Serial Test Controller Programming (STCP) tool. This technique allows a device to
be directly programmed on the user board. This is a two-step procedure where first the
board is first manufactured with a blank ST7, and afterwards the chip is programmed using
a programming tool (Starter Kit or EPB).
This application note describes the STCP method only.
AN987/1000
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1
ST7 SERIAL TEST CONTROLLER PROGRAMMING
2 SERIAL TEST CONTROLLER PROGRAMMING
2.1 ADVANTAGES
The advantages of STCP are numerous:
■
Time to market
To reduce manufacturing cycle times, a user board can be designed to be generic,
supporting several functions. These functions can be enabled or disabled by software
according to customer requirements. In this case, STCP allows application boards to be
manufactured in one shot and programmed with different functions according to customer
needs and orders.
■
Cost reduction
Software updates may be necessary in some cases because of a bug correction or a newly
implemented feature. The STCP is a flexible and painless way of performing such
modifications and at a lower cost. There is no need to add any sockets to the board or to
unsolder and change components in order to upgrade the application.
■
Security
Because STCP offers an easy way to customise the user’s program, or part of it, it can be
used to insert different key codes for each board. This could be used, for example, in a door
lock system.
■
Flexibility
For example, STCP can be used to allow calibration procedures to be performed directly in
the field.
2.2 USER BOARD SPECIFICATION
The user has to design his layout in order to support two modes: programming mode and user
mode.
Figure 1. shows the user board divided into two blocks:
■
Block 1:
Includes all the components that play a role during programming mode:
– Connector J1, which links the user board to the programming tool.
– The ST72 MCU, which is the device to be programmed.
– Jumpers W1 to Wn, whose purpose is to isolate the pins used for programming the ST72
from the other components in Block 2. In some application configurations, isolation resistors (47 kΩ) can be used instead of jumpers.
■
Block 2:
This block consists of all the other components soldered on the user board.
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2
ST7 SERIAL TEST CONTROLLER PROGRAMMING
Figure 1. User Board
% OR FN % OR FN
-
67
:Q
:
Now, let’s define the pins used for programming the ST7. These pins are put together in the
W1 connector implemented in all the ST programming tool boards (see Section 3 APPENDIX
1 for the pin connector assignment).
All the ST7 programming tools referred to in this note (ST7 starter kits and ST7 EPBs in the
MDT1, MDT3 and MDT4 tool families) use a programming technique called JTAG (Joint Test
Action Group).
These programming tools control 11 pins:
■
5 JTAG pins and 3 test mode pins, which are used for loading the software code into the
ST7. These pins are:
– Pin TCK: the test clock (input),
– Pin TMS: the Test Mode Select (input, weak pull-up),
– Pin TRST0: the Reset (Input, weak pull-up, active low)
– Pin TDI: the Test Data In (input, weak pull-up). This is the serial data input, sampled on
the rising edge of TCK.
– Pin TDO: the Test Data Out (tri-state output). This is the serial data output, updated on the
falling edge of TCK.
– Pins M0, M1 and M2: These 3 pins are used to force the test modes.
Depending on the device selected, these 8 pins will be associated with different pin numbers (see APPENDIX 1).
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ST7 SERIAL TEST CONTROLLER PROGRAMMING
If these pins need to be tied to VDD or VSS, or if they are used by the user’s application, they
must be isolated from the user circuitry during programming. To do so, a jumper can be
added for each of the eight pins (see Figure 2.).
Note: Isolation resistors (47 kΩ) can be used instead of jumpers only if these pins are used
by the application as input (without Pull-up, without pull-down, or analog input configuration).
■
3 system pins, VPP/TEST, RESET and OSCIN, which must be connected as follows:
– The VPP/TEST pin must not be directly connected to GND/VSS on the application board
in order to avoid any conflict with the programming voltage. This pin should be pulled down
by a 10 kΩ resistor (see Figure 2.).
– The RESET pin controls the entry into programming mode. This pin must be connected to
a 10 kΩ pull-up resistor and a 1 nF capacitor connected to GND (see Figure 2.) to avoid
any direct connections to VSS. This pin can be connected to a 47 kΩ isolation resistor if an
external reset is provided by the application board.
– The OSCIN pin synchronizes the programming operation using a clock generated by the
programming tool. The OSCIN pin can be directly connected to the J1 connector. No isolation is needed as long as a quartz crystal or ceramic resonator is used in the application.
If an external clock generator is used in the application, it must be disconnected during
STC programming.
Note: The OSCOUT pin does not need to be disconnected during the programming phase
as long as a crystal, a ceramic resonator or an external clock source is used to drive the
internal oscillator (user mode only).
■
The VDD and VSS power supply pins. The use of the VDD connection is optional, depending
on whether the application board supply can be disconnected or not.
If the application board supply is disconnected, the chip can be supplied through the
programming tool (as long as the total current load does not exceed 100 mA and the
capacitive load is less than 50 µF). In this case, only 1 jumper needs to be added in order to
disconnect the VPP pin from the user circuitry during the programming sequence. No jumper
is needed for VSS (see Figure 2.).
If you want to use the application board power supply, its voltage must be 5 V, so that logic
levels are compatible with those of the programming tool.
Note: In any case, the ground from the application board and the ground from the
programming tool must be connected together (see Figure 2.).
4/10
ST7 SERIAL TEST CONTROLLER PROGRAMMING
Figure 2. Block 1
To
block2
M0
OSCIN
M1
OSCOUT
M2
VDD appli
VPP/TEST
10 kΩ
VSS
Tck
VDD
Tms
Trst0
10 kΩ
Reset
Tdi
Tdo
To
block2
J1
Jumper or 47 kΩ isolation resistor
(depending on the application configuration, refer to the note on page 3).
Jumper use to disconnect the Application board supply if it is not 5 V.
If the application board supply can be used, remove this jumper and
remove the connection between pin VDD and connector J1.
The ST7 programming tool is connected to the user board via connector J1.
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ST7 SERIAL TEST CONTROLLER PROGRAMMING
2.3 PROGRAMMING PROCEDURE
Depending on the device you need to program, use one of these ST7 programming tools:
■
ST7 MDT1-KIT or ST7 MDT1-EPB. They cover the following devices:
– ST72101G1 or G2
– ST72212G2
– ST72213G1
– ST72251G1 or G2
■
ST7 MDT2-KIT or ST7 MDT4-EPB. They cover the following devices:
– ST72121J2 or J4
– ST72311J2 or J4
– ST72311N2 or N4
– ST72331J2 or J4
– ST72331N2 or N4
■
ST7 MDT4-KIT or ST7 MDT4-EPB. They cover the following devices:
– ST72272K2 or K4
– ST72372J4
– ST72371N4
– ST72671N4 or N6
After selecting the appropriate programming tool, proceed as follows:
1. On the application board, remove all jumpers.
2. Locate the 16 pin connector W1 (8x2 header HE10) on the programming tool which contains the 12 signals necessary for performing STCP (see Section 3 APPENDIX 1 for the pin
identification).Then connect the W1 connector of the programming tool to the application
board connector (J1 in Figure 1.).
3. Using the parallel interface cable, connect the PC parallel port to the parallel connector of
the programming tool.
4. Power on the PC and the board. On the programming tool, LED 1 must light up.
5. Start the Windows EPROMer, target the programming tool, then the correct device. Open
the file containing the code to program. And... program your device!
6. Close the operating software, power down the programming tool, disconnect the application board from the programming tool and replace any jumpers that were disconnected on
the application board. Your application is now ready to run!
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ST7 SERIAL TEST CONTROLLER PROGRAMMING
3 APPENDIX 1
The following table lists the devices supported by this application note and the specific starter
kit required for each sales type.
Sales Type
ST72x101G1
ST72x101G2
ST72x212G2
ST72x213G1
ST72x251G1
ST72x251G2
ST72x121J2
ST72x121J4
ST72x311J2
ST72x311J4
ST72x311N2
ST72x311N4
ST72x331J2
ST72x331J4
ST72x331N2
ST72x331N4
ST72x272K2
ST72x272K4
ST72x371N4
ST72x372J4
ST72x671N4
ST72x671N6
Starter Kit supporting the device
ST7 MDT1 Starter kit or EPB
ST7 MDT2 Starter kit or EPB
ST7 MDT4 Starter kit or EPB
x = T, if the device is an OTP,
E, if the device is an EPROM.
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ST7 SERIAL TEST CONTROLLER PROGRAMMING
4 APPENDIX 2
This appendix provides the required information for programming a device supported by the
MDT1, MDT2 and MDT4 EPBs or starter kits. The five JTAG pins and three test mode pins
(M0, M1 and M2) with their associated pin numbers are specified for each device.
4.1 ST7 MDT1 EPB OR STARTER KIT
ST7 Device
Sales type
Pin Numbers
EPROM E2 RAM Package
JTDI JTCK JTRST JTMS JTDO
M2
PA3
PA2
PA1
PA0
PC3
PB2 PB1 PB0
M1
M0
Vpp Reset Oscin Vdd Vss
ST72x101G1
4K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
ST72x101G2
8K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
ST72x212G2
8K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
ST72x213G1
4K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
ST72x251G1
4K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
ST72x251G2
8K
-
256
SO28
SDIP32
22
26
23
27
24
28
25
29
14
16
9
11
10
12
11
13
26
30
1
1
2
2
28
32
27
31
5
1
9
3
7
12
10
8
16
4
2
Programming tool W1 connector
x = T, if the device is an OTP,
E, if the device is an EPROM,
N.C., means not connected.
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N.C 15
ST7 SERIAL TEST CONTROLLER PROGRAMMING
4.2 ST7 MDT2 EPB OR STARTER KIT
ST7 Device
Pin Numbers
JTDI JTCK JTRST JTMS JTDO
M2
PA6
36
29
PA5
35
28
PA4
34
27
PA3
31
24
PB2 PB1 PB0
4
3
2
41
40
39
M1
Sales type
EPROM
E2
RAM
Package
ST72x121J2
8K
-
384
TQFP44
SDIP42
PA7
37
30
ST72x121J4
16K
-
512
TQFP44
SDIP42
37
30
36
29
35
28
34
27
31
24
4
41
3
40
ST72x311J2
8K
-
384
TQFP44
SDIP42
37
30
36
29
35
28
34
27
31
24
4
41
ST72x311J4
16K
-
512
TQFP44
SDIP42
37
30
36
29
35
28
34
27
31
24
ST72x311N2
8K
-
384
TQFP64
SDIP56
52
40
51
39
50
38
49
37
ST72x311N4
16K
-
512
TQFP64
SDIP56
52
40
51
39
50
38
ST72x331J2
8K
256
384
TQFP44
SDIP42
37
30
36
29
ST72x331J4
16K
256
512
TQFP44
SDIP42
37
30
ST72x331N2
8K
256
384
TQFP64
SDIP56
ST72x331N4
16K
256
512
TQFP64
SDIP56
M0
Vpp Reset Oscin
38
31
39
32
42
35
2
39
38
31
39
32
42
35
3
40
2
39
38
31
39
32
42
35
4
41
3
40
2
39
38
31
39
32
42
35
46
34
7
55
6
54
5
53
53
41
54
42
59
45
49
37
46
34
7
55
6
54
5
53
53
41
54
42
59
45
35
28
34
27
31
24
4
41
3
40
2
39
38
31
39
32
42
35
36
29
35
28
34
27
31
24
4
41
3
40
2
39
38
31
39
32
42
35
52
40
51
39
50
38
49
37
46
34
7
55
6
54
5
53
53
41
54
42
59
45
52
40
51
39
50
38
49
37
46
34
7
55
6
54
5
53
53
41
54
42
59
45
5
1
9
3
7
12
10
8
16
4
2
Programming tool W1 connector
4.3 ST7 MDT4 EPB OR STARTER KIT
ST7 Device
Sales type
Pin Numbers
EPROM E2 RAM Package
JTDI JTCK JTRST JTMS JTDO M2
PA7
PA6
PA5
PA4
M1
M0
PC6 DA3 DA2 DA1
Vpp Reset Oscin Vdd
Vss
ST72x272K2
8K
-
384
SO34
SDIP32
29
27
30
28
31
29
32
30
25
24
3
3
2
2
1
1
34
32
33
31
28
26
8
8
7
7
ST72x272K2
16K
-
512
SO34
SDIP32
29
27
30
28
31
29
32
30
25
24
3
3
2
2
1
1
34
32
33
31
28
26
8
8
7
7
ST72x371N4
16K
-
512
TQFP64
SDIP56
28
46
29
47
30
48
31
49
20
38
43
3
42
2
41
1
40
56
38
54
27
45
11
31
9
29
ST72x372J4
16K
-
512
SDIP42
34
35
36
37
31
2
1
42
41
40
33
25
23
TQFP64
SDIP56
TQFP64
SDIP56
28
46
28
46
29
47
29
47
30
48
30
48
31
49
31
49
20
38
20
38
43
3
43
3
42
2
42
2
41
1
41
1
40
56
40
56
38
54
38
54
27
45
27
45
11
31
11
31
9
29
9
29
5
1
9
3
7
12
10
8
16
4
2
N.C
15
ST72x671N4
16K
-
512
ST72x671N6
32K
-
1K
Programming tool W1 connector
x = T, if the device is an OTP,
E, if the device is an EPROM,
N.C., means not connected.
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ST7 SERIAL TEST CONTROLLER PROGRAMMING
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