STMicroelectronics NUCLEO-8S207K8 User Manual
ST NUCLEO-8S207K8 is an affordable and flexible way to try out new concepts and build prototypes with STM8S Series microcontrollers. It features an STM8S207K8T6C STM8 8-bit MCU, 4 LEDs for communication, power, user, and default status indication, a reset push-button, and various expansion connectors. The board provides flexible power supply options and an on-board ST-LINK/V2-1 debugger/programmer, making it easy to get started with development.
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UM2391
User manual
STM8 Nucleo-32 board (MB1442)
Introduction
The NUCLEO-8S207K8 STM8 Nucleo-32 board featuring the STM8S207K8T6C STM8 8-bit MCU provides an affordable and flexible way for users to try out new concepts and build prototypes with STM8S Series microcontrollers in LQFP32 package, choosing from the various combinations of performance, power consumption, and features. The ARDUINO ® Nano connectivity support makes it easy to expand the functionality of the Nucleo-32 open development platform with a wide choice of specialized shields. The STM8 Nucleo-32 board does not require any separate probe as it integrates the ST-LINK/V2-1 debugger/ programmer and comes with the STM8 standard peripheral library, together with various packaged software examples.
Figure 1. NUCLEO-8S207K8 top view Figure 2. NUCLEO-8S207K8 bottom view
Pictures are not contractual.
UM2391 - Rev 1 - November 2019
For further information contact your local STMicroelectronics sales office.
www.st.com
1
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Features
Features
•
•
•
•
•
•
•
•
STM8 microcontroller in LQFP32 32-pin package
4 LEDs:
– USB communication (LD1)
– Power (LD2)
– User (LD3)
– Default (LD4)
1 reset push-button
Board connectors:
– ARDUINO ® Nano V3 expansion connector
– Micro-B USB connector for the ST-LINK
– SWIM interface
Flexible power-supply options: ST-LINK USB V
BUS
or external sources (3.3 V, 5 V, 7 V – 12 V)
On-board ST-LINK/V2-1 debugger/programmer with SWIM connector and USB re-enumeration capability: mass storage, Virtual COM port and debug port
Comprehensive free software STM8 libraries including a variety of software examples
Support of a wide choice of Integrated Development Environments (IDEs) including STMicroelectronics free
STVD-STM8 (using Cosmic toolchain), IAR ™ , Cosmic free IDEA
UM2391 - Rev 1 page 2/25
2
2.1
2.2
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Ordering information
Ordering information
reference manual of the target STM32.
Order code
NUCLEO-8S207K8
Table 1. Ordering information
Board reference
MB1442
Target STM32
STM8S207K8T6C
Product marking
Evaluation tools marked as “ES” or “E” are not yet qualified and therefore not ready to be used as reference design or in production. Any consequences deriving from such usage will not be at ST charge. In no event, ST will be liable for any customer usage of these engineering sample tools as reference designs or in production.
“E” or “ES” marking examples of location:
• On the targeted STM8 that is soldered on the board (for illustration of STM8 marking, refer to the STM8 datasheet “Package information” paragraph at the www.st.com
website).
• Next to the evaluation tool ordering part number that is stuck or silk-screen printed on the board.
Codification
The meaning of the codification is explained in Table 2
.
NUCLEO-XXYYYKT
XX
YYY
K
T
Table 2. Codification explanation
Description
MCU series in STM8 8-bit MCUs
MCU product line in the series
STM8 package pin count
•
•
•
•
•
STM8 Flash memory size:
3 for 256 bytes
4 for 16 Kbytes
6 for 32 Kbytes
8 for 64 Kbytes
B for 128 Kbytes
Example: NUCLEO-8S207K8
STM8S Series
STM8S207
32 pins
64 Kbytes
The order code is mentioned on a sticker placed on the top side of the board.
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3
3.1
3.2
3.3
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Development environment
Development environment
•
•
System requirements
Windows ® OS (7, 8 and 10)
USB Type-A to Micro-B cable
•
•
•
Development toolchains
STMicroelectronics: free STVD-STM8 (using Cosmic toolchain)
IAR ™ : IAR-EWSTM8
Cosmic: free IDEA
Demonstration software
The demonstration software is preloaded in the STM8 Flash memory for easy demonstration of the device peripherals in standalone mode. The latest versions of the demonstration source code and associated documentation can be downloaded from the demonstration resource section of the STM8 Nucleo board webpage at www.st.com
.
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4
Conventions
provides the conventions used for the ON and OFF settings in the present document.
Convention
Jumper JPx ON
Jumper JPx OFF
Jumper JPx [1-2]
Solder bridge SBx ON
Solder bridge SBx OFF
Resistor Rx ON
Resistor Rx OFF
Table 3. ON/OFF convention
Definition
Jumper fitted
Jumper not fitted
Jumper should be fitted between Pin 1 and Pin 2
SBx connections closed by 0 Ω resistor
SBx connections left open
Resistor soldered
Resistor not soldered
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Conventions
UM2391 - Rev 1 page 5/25
5
5.1
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Quick start
Quick start
The NUCLEO-8S207K8 STM8 Nucleo-32 board featuring the STM8S207K8T6C STM8 8-bit MCU provides an affordable and flexible way for users to try out new concepts and build prototypes with an STM8S Series microcontroller in an LQFP32 package.
Before installing and using the product, accept the Evaluation Product License Agreement from the www.st.com/ epla webpage.
For more information on the STM8 Nucleo-32 board and to access demonstration software, visit the www.st.com
webpage.
Getting started
1.
Check jumper position onboard: JP1 (VDD) on [1-2] or [2-3] position.
2.
Connect the STM8 Nucleo board to a PC with a Type-A to Micro-B USB cable through the USB connector
CN1 to power the board. Then LED LD1 (COM) and red LED LD2 (PWR) light up, the green LED LD3 blinks.
3.
Remove the jumper placed between D2 (CN3 pin 5) and GND (CN3 pin 4).
4.
Observe how the blinking of green LED LD3 changes when the jumper is in place or removed.
5.
Download the demonstration software and several examples that help to use the STM8 Nucleo features.
These are available at the NUCLEO-8S207K8 product webpage.
6.
Develop your own applications using the provided examples.
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6
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Hardware layout and configuration
Hardware layout and configuration
The STM8 Nucleo-32 board is designed around an STM8S Series microcontroller in an LQFP32 package.
shows the connections between the STM8 and its peripherals (ST-LINK/V2-1, push-button, LED, and
ARDUINO ® Nano V3 expansion connector).
and Figure 5 show the location of these features on the STM8 Nucleo-32 board.
The mechanical dimensions of the board are shown in
Figure 3. Hardware block diagram
Micro
USB
Embedded
ST-LINK/V2-1
IO
STM8
Microcontroller
IO
RESET
B1
RST
LED
LD3
UM2391 - Rev 1 page 7/25
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STM8 Nucleo-32 board layout
6.1
STM8 Nucleo-32 board layout
Figure 4. STM8 Nucleo-32 board top layout
LD1
(Red/Green LED)
COM
CN1
ST-LINK Micro-B
USB connector
CN2
ST-LINK SWD connector (reserved)
SB8 connects
STM8 pin PD7 to TLI
U3
3V3 regulator
UM2391 - Rev 1
SB4 connects
VCP RX to ST-LINK
SB3 connects
VCP TX to ST-LINK
LD2
Red LED Power
U5
STM8 microcontroller
SB5 connects
OSCIN / PA1 to MCO
B1
Reset button
LD3
Green LED page 8/25
UM2391 - Rev 1
U6
5V regulator
CN4
ARDUINO ®
Nano connector
Figure 5. STM8 Nucleo-32 board bottom layout
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STM8 Nucleo-32 board layout
LD4
Default LED
CN3
ARDUINO ®
Nano connector
SB1
Power configuration
SB2
RST mode of STM8
JP1
VDD select page 9/25
6.2
Mechanical drawing
Figure 6. STM8 Nucleo-32 board mechanical drawing (in millimeter)
18.54 mm
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Mechanical drawing
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1.65 mm
15.24 mm page 10/25
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Embedded ST-LINK/V2-1
6.3
6.3.1
Note:
Embedded ST-LINK/V2-1
•
•
•
•
The ST-LINK/V2-1 programming and debugging tool is integrated into the STM8 Nucleo-32 board.
For detailed information about the debugging and programming features of ST-LINK/V2-1, refer to the ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 user manual ( UM1075 ) and Overview of ST-LINK derivatives technical note ( TN1235 ).
Features supported by the ST-LINK/V2-1:
USB software re-enumeration
Virtual COM port interface on USB
Mass storage interface on USB
USB power management request for more than 100 mA power on USB
Features not supported on ST-LINK/V2-1:
• SWIM interface
The embedded ST-LINK/V2-1 is directly connected to the SWIM port of the target STM8.
Drivers
The ST-LINK/V2-1 requires a dedicated USB driver, which, for Windows 7 ® , Windows 8 ® and Windows 10 ® , is found at www.st.com
.
In case the STM8 Nucleo-32 board is connected to the PC before the driver is installed, some STM8 Nucleo-32 interfaces may be declared as “Unknown” in the PC device manager. In this case, the user must install the dedicated driver files, and update the driver of the connected device from the device manager as shown in
.
Prefer using the USB Composite Device handle for a full recovery.
Figure 7. USB composite device
6.3.2
ST-LINK/V2-1 firmware upgrade
The ST-LINK/V2-1 embeds a firmware mechanism for the in-situ upgrade through the USB port. As the firmware may evolve during the lifetime of the ST-LINK/V2-1 product (for example new functionalities, bug fixes, support for new microcontroller families), it is recommended to visit the www.st.com
website before starting to use the STM8
Nucleo-32 board and periodically, to stay up-to-date with the latest firmware version.
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Power supply and power selection
6.4
6.4.1
Power supply and power selection
The power supply is provided either by the host PC through the USB cable, or by an external source: VIN (7 V-12
V), 5V or 3V3 power supply pins on CN4. In case VIN, 5V or 3V3 is used to power the STM8 Nucleo-32 board, this power source must comply with the standard EN-60950-1: 2006+A11/2009, and must be Safety Extra Low
Voltage (SELV) with limited power capability.
The MCU power supply is also selectable: 3V3 or 5V.
Power supply input from the USB connector
The STM8 Nucleo-32 board and shield board can be powered from the ST-LINK USB connector CN1. Note that only the ST-LINK part is power supplied before the USB enumeration phase, as the host PC only provides 100 mA to the boards at that time. During the USB enumeration, the STM8 Nucleo-32 board requires 300 mA of current to the host PC. If the host is able to provide the required power, the targeted STM8 microcontroller is powered and the red LED LD2 is turned on, thus the STM8 Nucleo-32 board and its shield consume a maximum of 300 mA current and not more. If the host is not able to provide the required current, the targeted STM8 microcontroller and the shield board are not power supplied. As a consequence, the red LED LD2 stays turned
6.4.2 External Power supply inputs
.
SB1 is configured according to the maximum current consumption of the board. SB1 can be set to ON to inform the host PC that the maximum current consumption does not exceed 100 mA (even when ARDUINO ® Nano shield is plugged). In such a condition, USB enumeration always succeeds since no more than 100 mA is
requested to the host PC. Possible configurations of SB1 are summarized in Table 4 .
Caution:
Note:
Table 4. SB1 configuration
SB1 OFF
SB1 ON
Power supply
USB power through CN1
1. The default configuration is reported in bold style.
Maximum current
300 mA
100 mA
If the maximum current consumption of the STM8 Nucleo-32 board and its shield board exceeds 300 mA, it is mandatory to power the STM8 Nucleo-32 board, using an external power supply connected to VIN, 5V or 3V3.
In case the board is powered by a USB charger, there is no USB enumeration, so the LED LD2 remains set to off permanently and the target STM8 is not powered. In this specific case, the SB1 must be set to ON, to allow the target STM8 to be powered anyway.
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Power supply and power selection
6.4.2
6.4.3
External Power supply inputs
The STM8 Nucleo-32 board and its shield boards can be powered in three different ways from an external power
supply, depending on the voltage used. The three power sources are summarized in Table 5 .
Table 5. External power sources
Input power name
Connector pins Voltage range
Max.
current
VIN
5V
3V3
CN4 pin 1
CN4 pin 4
CN4 pin 14
7 to 12 V
4.75 to 5.25 V
3.0 to 3.6 V
Limitation
800 mA
•
•
•
•
From 7 to 12 V only and input current capability is linked to input voltage:
800 mA input current when VIN = 7 V
450 mA input current when 7 V < VIN < 9 V
300 mA input current when 9 V < VIN < 10 V
Less than 300 mA input current when 10 V < VIN
-
500 mA ST-LINK not powered
ST-LINK not powered and SB13 must be OFF.
VIN or 5V power supply
When powered from VIN or 5V, it is still possible to use ST-LINK for communication for programming or debugging only, but it is mandatory to power the board first, using VIN or 5V, then to connect the USB cable to the
PC. In this way, the enumeration always succeeds, thanks to the external power source.
The following power sequence procedure must be respected:
1.
Check that SB1 is OFF
2.
Connect the external power source to VIN or 5V
3.
Power on the external power supply 7 V < VIN < 12 V to VIN, or 5V
4.
Check red LED LD2 is turned ON
5.
Connect the PC to USB connector CN1
If this order is not respected, the board may be powered by V
BUS
first, then by VIN or 5V, and the following risks may be encountered:
1.
If more than 300 mA current is needed by the board, the PC may be damaged or current supplied is limited by the PC. As a consequence, the board is not powered correctly.
2.
300 mA is requested at enumeration (since SB1 must be off) so there is the risk that the request is rejected and the enumeration does not succeed if the PC cannot provide such current. Consequently, the board is not power supplied (LED LD2 remains OFF).
3V3 power supply
When the board is powered by 3V3 (CN4 pin 14), the solder bridge SB13 must be OFF.
Using the 3V3 (CN4 pin 14) directly as power input can be interesting, for instance, in case the 3.3 V is provided by a shield board. In this case, the ST-LINK is not powered, thus programming and debugging features are not available.
In addition, to ensure powering the MCU, JP1 must be set to position [1-2].
External Power supply output
When powered by USB or VIN, the 5V (CN4 pin 4) can be used as an output power supply for an ARDUINO ®
Nano shield. In this case, the maximum current of the power source specified in
Table 5. External power sources
must be respected.
The 3.3V (CN4 pin 14) can be used also as a power supply output. The current is limited by the maximum current capability of the regulator U7 (500 mA max).
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LEDs
6.6
6.7
6.4.4
6.5
MCU power selection
JP1, VDD choice, selects the power supply of MCU in 3V3 or 5V:
• 3V3: Connect the jumper between pin 1 and 2 of JP1
• 5V: Connect the jumper between pin 2 and 3 of JP1
•
•
It is possible to measure the STM32 microcontroller consumption by removing the jumper and connecting an ammeter:
Ammeter connected between [1-2]: power consumption measurement for VDD= 3V3
Ammeter connected between [2-3]: power consumption measurement for VDD= 5V
LEDs
•
•
•
•
•
•
The tricolor LED (green, orange, red) LD1 (COM) provides information about ST-LINK communication status. The
LD1 default color is red. LD1 turns to green to indicate that the communication is in progress between the PC and the ST-LINK/V2-1, with the following setup:
•
Slow blinking red/OFF: at power-on before USB initialization
Fast blinking red/OFF: after the first correct communication between PC and ST-LINK/V2-1 (enumeration)
Red ON: when initialization between PC and ST-LINK/V2-1 is completed
Green ON: after a successful target communication initialization
Blinking red/green: during communication with the target
Green ON: communication finished and successful
Orange ON: communication failure
User LD3: The green LED is a user LED connected to the CN4 connector pin 15 (D13).
• When the I/O is HIGH value, the LED is ON
• When the I/O is LOW, the LED is OFF
PWR LD2: the red LED indicates that the STM8 part is powered and 5V power is available.
Default LD4: the red LED is a default LED connected to U2. It indicates that the current has exceeded the expected limit.
Push-button
B1 RESET: the push-button is connected to NRST, and it is used to reset the STM8.
UART Virtual communication
Thanks to SB3 and SB4, the UART interface of STM8 available on PD5 (TX) and PD6 (RX), can be connected to
ST-LINK/V2-1. When UART Virtual communication is not used it is possible to use PD5/PD6 on ARDUINO ® CN3 pins D1/D0. Refer to
.
Table 6. Virtual communication configuration
Solder bridge
SB3
SB4
ON
State
OFF
ON
OFF
Description
UART virtual communication enabled
No UART virtual communication
UART virtual communication enabled
No UART virtual communication
1. The default configuration is reported in bold style.
UM2391 - Rev 1 page 14/25
6.8
UM2391
Solder bridge configuration
Solder bridge configuration
details the solder bridges of the STM8 Nucleo-32 board.
Table 7. Solder bridge configuration
Bridge
SB1
SB2
SB3, SB4 (ST-LINK-UART)
SB5
SB6
SB7, SB9
SB8
SB10
SB11
SB12
Setting
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
SB13
ON
OFF
1. The default configuration is reported in bold style.
Description
USB power through CN1 allowed (100 mA max)
USB power through CN1 allowed (300 mA max)
STM8 forced in a Reset mode
STM8 not forced in a Reset mode (standard operation)
PA2 and PA3 on STM32F103CBT6 (ST-LINK MCU) are connected respectively to PD5 and PD6 on STM8 to have UART virtual communication enabled. Thus SB7 and SB9 must be OFF.
PA2 and PA3 on STM32F103CBT6 (ST-LINK MCU) are disconnected from respectively PD5 and PD6 on STM8. PD5 and PD6 can be used as GPIO on Arduino connector CN4.
MCO on STM32F103CBT6 (ST-LINK MCU) is connected to PA1 on
STM8.
MCO on STM32F103CBT6 (ST-LINK MCU) is disconnected from
PA1 on STM8.
GND is connected to AGND.
GND is not connected to AGND.
T_VCP_TX and T_VCP_RX are connected to CN3.
T_VCP_TX and T_VCP_RX are disconnected from CN3.
STM8 PD7 is connected to CN4 pin 5 for TLI support on
ARDUINO ® Nano A7.
STM8 PD7 is disconnected to CN4 pin 5 for TLI support on ARDUINO ®
Nano A7.
STM8 PF4 is connected to CN4 pin 5 for AI12 support on ARDUINO ®
Nano A7.
STM8 PF4 is disconnected from CN4 pin 5 for AI12 support on
ARDUINO ® Nano A7.
STM8 PF4 is connected to CN4 pin 6 for AI12 support on
ARDUINO ® Nano A6.
STM8 PF4 is disconnected from CN4 pin 6 for AI12 support on
ARDUINO ® Nano A6.
STM8 PD7 is connected to CN4 pin 6 for TLI support on ARDUINO ®
Nano A6.
STM8 PD7 is disconnected from CN4 pin 6 for TLI support on
ARDUINO ® Nano A6.
Output of voltage regulator LD39050PU33R is connected to 3.3V.
Output of voltage regulator LD39050PU33R is not connected.
UM2391 - Rev 1 page 15/25
UM2391
ARDUINO® Nano connectors
6.9
Caution:
ARDUINO
®
Nano connectors
CN3 and CN4 are male connectors compatible with ARDUINO ® Nano standard. Most shields designed for
ARDUINO ® Nano can fit the STM8 Nucleo-32 board
The STM8 I/Os are 3.3 V compatible instead of 5 V for ARDUINO ® Nano.
Figure 8. ARDUINO ® Nano connectors
NUCLEO-8S207K8
PD5
PD6
NRST
GND
PD0
PC1
PD2
PC2
PC3
PA1
PA2
PC4
PE5 / PD4
PC6 / PD3
PC7
3
4
8
9
13
14
1
2
5
6
7
10
11
12
15
D1
D0
RESET
GND
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
CN3
VIN
GND
RESET
+5V
A7
A6
A5
A4
A3
A2
A1
A0
AREF
+3V3
D13
7
8
9
5
6
10
11
12
13
14
15
1
2
3
4
VIN
GND
NRST
+5V
PD7 || PF4
PF4 || PD7
PB4
PB5
PB3
PB2
PB1
PB0
AREF
+3V3
PC5
CN4
ARDUINO
®
UM2391 - Rev 1 page 16/25
UM2391 - Rev 1
UM2391
ARDUINO® Nano connectors
shows the ARDUINO ® Nano connector pin assignment on the STM8 Nucleo-32 board.
Table 8. ARDUINO ® Nano connectors on the STM8 Nucleo-32 board
Connector Pin number Pin name STM8 pin
Left connector
PD5
Function
CN3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
D1
D0
RESET
GND
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
PD6
NRST
-
PD0
PC1
PD2
PC2
PC3
PA1
PA2
PC4
PE5 / PD4
PC6 / PD3
PC7
Right connector
-
-
-
NRST
PD7 | | PF4
PF4 | | PD7
PB4
PB5
PB3
PB2
PB1
-
PB0
-
PC5
-
-
UART_RX
RESET
Ground
TIM3_CH2
TIM1_CH1
TIM3_CH1
TIM1_CH2
TIM1_CH3
TIM1_CH4
SPI_NSS / TIM2_CH1
SPI_MOSI / TIM2_CH2
SPI_MISO
CN4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
VIN
GND
RESET
+5V
A7
A6
A5
A4
A3
A2
A1
A0
AREF
+3V3
D13
Power input
Ground
-
RESET
Analog input 12 | | TLI
Analog input 4 | | I2C_SCL
Analog input 5 | | I2C_SDA
Analog input 3
Analog input 2
Analog input 1
Analog input 0
VDDA
3.3 V I/O
SPI clock
1. SB not fitted
2. In order not to have any conflict on the VCP signals (PD5 and PD6) when SB7 and SB9 are ON, SB3 and SB4 of ST-LINK must be OFF. Conversely for the other case.
page 17/25
7
7.1
7.2
UM2391
Federal Communications Commission (FCC) and Industry Canada (IC) Compliance Statements
Federal Communications Commission (FCC) and Industry Canada
(IC) Compliance Statements
FCC Compliance Statement
Part 15.19
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
Part 15.21
Any changes or modifications to this equipment not expressly approved by STMicroelectronics may cause harmful interference and void the user's authority to operate this equipment.
Part 15.105
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense.
Responsible party (in the USA)
Terry Blanchard
Americas Region Legal | Group Vice President and Regional Legal Counsel, The Americas
STMicroelectronics, Inc.
750 Canyon Drive | Suite 300 | Coppell, Texas 75019
USA
Telephone: +1 972-466-7845
IC Compliance Statement
Industry Canada ICES-003 Compliance Label: CAN ICES-3 (A) / NMB-3 (A).
UM2391 - Rev 1 page 18/25
8
8.1
UM2391
CE conformity
CE conformity
Warning
EN 55032 / CISPR32 (2012) Class A product
Warning: this device is compliant with Class A of EN55032 / CISPR32. In a residential environment, this equipment may cause radio interference.
Avertissement : cet équipement est conforme à la Classe A de la EN55032 / CISPR 32. Dans un environnement résidentiel, cet équipement peut créer des interférences radio.
UM2391 - Rev 1 page 19/25
Revision history
Date
14-Nov-2019
Version
1
Table 9. Document revision history
Changes
Initial release
UM2391
UM2391 - Rev 1 page 20/25
UM2391
Contents
Contents
7 Federal Communications Commission (FCC) and Industry Canada (IC) Compliance
UM2391 - Rev 1 page 21/25
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Contents
UM2391 - Rev 1 page 22/25
UM2391
List of tables
List of tables
UM2391 - Rev 1 page 23/25
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List of figures
List of figures
UM2391 - Rev 1 page 24/25
UM2391
IMPORTANT NOTICE – PLEASE READ CAREFULLY
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Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of
Purchasers’ products.
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.
© 2019 STMicroelectronics – All rights reserved
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