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This article provides an overview of STM32MP157x-DKx Discovery kits.
Board overview
Position |
Description
|
1 |
MB1272 motherboard
|
2 |
MB1407 daughterboard DSI display (480x800 pixels): only for the {{#vardefine:info|}}{{#vardefine:typ|}}{{#vardefine:info|}}STM32MP157C-DK2{{#var:typ}} {{#var:info}} and {{#vardefine:info|}}{{#vardefine:typ|}}{{#vardefine:info|}}STM32MP157F-DK2{{#var:typ}} {{#var:info}} Discovery kits
|
3 (CN15) |
microSD card
|
Position |
Description |
Position |
Description
|
10 (U5) |
DDR3L 16 bits
|
11 (CN5) |
2 USB Type-A (host)
|
12 (U13) |
STM32MP157x 12x12
|
13 (U14) |
HDMI
|
14 (CN7 and U12) |
USB Type-C (DRP)
|
15 (CN8 and (U18) |
Ethernet
|
16 (B1) |
Wakeup button
|
17 (CN10) |
Audio headset
|
18 (U20) |
Audio codec (Cirrus CS42L51)
|
19 (B2) |
Reset button
|
20 (LD5) |
User LED (green)[LEDs 1]
|
21 (B3) |
User button (USER1)
|
22 (LD6) |
User LED (red)[LEDs 1]
|
23 (B4) |
User button (USER2)
|
24 (LD7) |
User LED (orange)[LEDs 1]
|
25 (LD8) |
User LED (blue)[LEDs 1]
|
26 (CN11 and U19) |
USB micro-B (ST-LINK/V2-1)
|
27 (LD4) |
ST-LINK/V2-1 LED (bicolor)[LEDs 2]
|
28 ('CN12) |
ST-LINK/V2-1 DFU
|
29 (CN9) |
HDMI connector
|
Position |
Description |
Position |
Description
|
10 (U5) |
DDR3L 16 bits
|
11 (CN5 and U7) |
2 USB Type-A (host)
|
12 (U13) |
STM32MP157x 12x12
|
13 (U14) |
HDMI
|
14 (CN7 and U12) |
USB Type-C (DRP)
|
15 (CN8 and (U18) |
Ethernet
|
30 (LD1) |
USB Type-A LED (red)[LEDs 3]
|
31 (CN2) |
GPIO expansion
|
32 (U4) |
PMIC (STPMIC1A)
|
33 (CN4) |
DSI LCD connector
|
34 (LD3) |
Ethernet LED (green)[LEDs 4]
|
35 (CN6) |
USB Type-C (power 5V-3A)
|
36 (LD2) |
Power LED (green)[LEDs 5]
|
37 (U8) |
}}{{#vardefine:typ|}}{{#vardefine:info|}}STM32MP157C-DK2{{#var:typ}} {{#var:info}} and {{#vardefine:info|}}{{#vardefine:typ|}}{{#vardefine:info|}}STM32MP157F-DK2{{#var:typ}} {{#var:info}} Discovery kits
|
40 (CN13) |
Arduino Uno connector (socket 10x1)
|
41 (CN14) |
Arduino Uno connector (socket 8x1)
|
Position |
Description |
Position |
Description
|
40 (CN13) |
Arduino Uno connector (socket 10x1)
|
41 (CN14) |
Arduino Uno connector (socket 8x1)
|
42 (LD9) |
Arduino LED (green)
|
43 (SW1) |
Boot mode selection
|
44 (CN16) |
Arduino Uno connector (socket 8x1)
|
45 (CN17) |
Arduino Uno connector (socket 6x1)
|
Details about some LEDs:
-
↑ 1.01.11.21.3 LD5, LD6, LD7, LD8: some user LEDs are used to reflect the system activity, while the others are left free to be used by the application, as explained in LEDs and buttons on STM32 MPU boards article
-
↑ LD4: flashes red if ST-LINK/V2-1 connection not established, else green
-
↑ LD1: turns red if USB Type-A connection established
-
↑ LD3: flashes green when Ethernet connection established
-
↑ LD2: turns green if power connection established
Board connection
The connections shown in the picture below are the ones recommended to start with the STM32MP157x_DKx Discovery kits. As shown in the board overview, other connectors are available for these boards (for example HDMI).
STM32MP157x-DKx - board connections
Boot related switches
The following table defines the different combination of the boot mode selection switches:
|
"Boot 1" is grounded (always 0) on the Discovery kits
|
Boot modes
Boot mode |
Boot 0 |
Boot 1 |
Boot 2
|
Forced USB boot for flashing |
0 |
0 |
0
|
Not supported |
1 |
0 |
0
|
Engineering boot |
0 |
0 |
1
|
microSD card |
1 |
0 |
1
|
Below the corresponding configurations of the boot related switches (SW1 on the board overview picture):
GPIO mapping
GPIO expansion connector
The pins of the GPIO expansion connector (CN2 on the board overview picture) are described in the following table:
GPIO expansion connector
Function |
STM32 pin |
Pin |
Pin |
STM32 pin |
Function
|
3V3 |
- |
1 |
2 |
- |
5V
|
GPIO2 / I2C5_SDA |
PA12 |
3 |
4 |
- |
5V
|
GPIO3 / I2C5_SCL |
PA11 |
5 |
6 |
- |
GND
|
GPIO4 / MCO1 |
PA8 |
7 |
8 |
PB10 |
GPIO14 / USART3_TX
|
GND |
- |
9 |
10 |
PB12 |
GPIO15 / USART3_RX
|
GPIO17 / USART3_RTS |
PG8 |
11 |
12 |
PI5 |
GPIO18 / SAI2_SCKA[EX 1]
|
GPIO27 / SDMMC3_D3 |
PD7 |
13 |
14 |
- |
GND
|
GPIO22 / SDMMC3_CK |
PG15 |
15 |
16 |
PF1 |
GPIO23 / SDMMC3_CMD
|
3V3 |
- |
17 |
18 |
PF0 |
GPIO24 / SDMMC3_D0
|
GPIO10 / SPI5_MOSI |
PF9 |
19 |
20 |
- |
GND
|
GPIO9 / SPI5_MISO |
PF8 |
21 |
22 |
PF4 |
GPIO25 / SDMMC3_D1
|
GPIO11 / SPI5_SCK |
PF7 |
23 |
24 |
PF6 |
GPIO8 / SPI5_NSS
|
GND |
- |
25 |
26 |
PF3 |
GPIO7
|
I2C1_SDA[EX 2]
|
PF15 |
27 |
28 |
PD12 |
I2C1_SCL[EX 2]
|
GPIO5 / MCO2 |
PG2 |
29 |
30 |
- |
GND
|
GPIO6 / TIM5_CH2 |
PH11 |
31 |
32 |
PD13 |
GPIO12 / TIM4_CH2
|
GPIO13 / TIM3_CH2 |
PC7 |
33 |
34 |
- |
GND
|
GPIO19 / SAI2_FSA[EX 1]
|
PI7 |
35 |
36 |
PB13 |
GPIO16 / USART3_CTS
|
GPIO26 / SDMMC3_D2 |
PF5 |
37 |
38 |
PI6 |
GPIO20 / SAI2_SDA[EX 1]
|
GND |
- |
39 |
40 |
PF11 |
GPIO21 / SAI2_SDB[EX 1]
|
-
↑ 1.01.11.21.3 The SAI2 is shared between the audio codec and the GPIO expansion connector. By default, the SAI2 is connected to the audio codec thanks to Solder Bridge SB13, SB14, SB15, and SB16: more details in the STM32MP157x-DKx discovery board user manual.
-
↑ 2.02.1 Warning: the I2C1 is used to communicate with several on-board peripherals, but is also available on the GPIO expansion connector. So, it is important to ensure that new components added on the I2C1 connection will not disturb the bus behavior.
Arduino Uno connector
The pins of the Arduino Uno connector are described in the following table:
Arduino Uno connector
|
Socket 10x1 (CN13)
Pin names |
Signal name |
STM32 pin |
Comment
|
1 |
ARD_D8 |
PG3 |
IO
|
2 |
ARD_D9 |
PH6 |
TIM12_CH1
|
3 |
ARD_D10 |
PE11 |
SPI4_NSS and TIM1_CH2
|
4 |
ARD_D11 |
PE14 |
SPI4_MOSI and TIM1_CH4
|
5 |
ARD_D12 |
PE13 |
SPI4_MISO
|
6 |
ARD_D13 |
PE12 |
SPI4_SCK
|
7 |
GND |
- |
GND
|
8 |
VREFP |
- |
VREF+
|
9 |
ARD_D14 |
PA12 |
I2C5_SDA
|
10 |
ARD_D15 |
PA11 |
I2C5_SCL
|
|
Socket 8x1 (CN14)
Pin names |
Signal name |
STM32 pin |
Comment
|
1 |
ARD_D0 |
PE7 |
UART7_RX
|
2 |
ARD_D1 |
PE8 |
UART7_TX
|
3 |
ARD_D2 |
PE1 |
IO
|
4 |
ARD_D3 |
PD14 |
TIM4_CH3
|
5 |
ARD_D4 |
PE10 |
IO
|
6 |
ARD_D5 |
PD15 |
TIM4_CH4
|
7 |
ARD_D6 |
PE9 |
TIM1_CH1
|
8 |
ARD_D7 |
PD1 |
IO
|
|
socket 8x1 (CN16)
Pin names |
Signal name |
STM32 pin |
Comment
|
1 |
NC |
- |
NC (reserved for test)
|
2 |
3V3 |
- |
IOREF 3V3
|
3 |
NRST |
NRST |
NRST
|
4 |
3V3 |
- |
3V3
|
5 |
5V |
- |
5V
|
6 |
GND |
- |
GND
|
7 |
GND |
- |
GND
|
8 |
VIN |
- |
Not connected
|
|
Socket 6x1 (CN17)
Pin names |
Signal name |
STM32 pin |
Comment
|
1 |
A0 |
PF14 |
ADC1_IN0
|
2 |
A1 |
PF13 |
ADC1_IN1
|
3 |
A2 |
ANA0 |
ADC1_IN6
|
4 |
A3 |
ANA1 |
ADC1_IN2
|
5 |
A4 |
PC3 / PA12 |
ADC1_IN13
|
6 |
A5 |
PF12 / PA11 |
|
|
User buttons and LEDs
The GPIO assignments for the user buttons and LEDs are described in the following table. Refer to LEDs and buttons on STM32 MPU boards article to get information on the functional mapping for each one.
GPIO for user buttons and LEDs
LED color and label
|
Button label
|
GPIO
|
Green LD5 (*)
|
USER1 (*)
|
PA14
|
Red LD6 (*)
|
USER2 (*)
|
PA13
|
Orange LD7
|
-
|
PH7
|
Blue LD8
|
-
|
PD11
|
|
(*) Both a LED and a button are connected to the same GPIO, with inverted logic for the LED control (so the LED is switched on when the GPIO output is set to low).
|