Table 20 describe the LCD interface and pinout of LCD connector CN4.
Table 20. LCD interface and CN4 connector pinout
Pin STM32 pin Signal name Function
1 - GND GND
2 DSI_D1N DSI_D1_N D1N
3 DSI_D1P DSI_D1_P D1P
4 - GND GND
5 DSI_CKN DSI_CK_N CKN
6 DSI_CKP DSI_CK_P CKP
7 - GND GND
8 DSI_D0N DSI_D0_N D0N
9 DSI_D0P DSI_D0_P D0P
10 - GND GND
11 PD12 I2C1_SCL SCL
12 PF15 I2C1_SDA SDA
13 - GND GND
14 - 3V3 3V3
15 - 3V3 3V3
16 - GND GND
17 PF2 LCD_INT INT
18 PC6 DSI_TE TE
19 PA15 LCD_BL_CTRL CTRL
20 PE4 DSI_RESET RESET
6.15 Gigabit Ethernet
6.15.1 Description
The STM32MP157D-DK1 and STM32MP157F-DK2 Discovery kits provide a reduced gigabit media-independent
interface (RGMII).
The STM32MP157x requires an external physical interface device (PHY). The Ethernet PHY on the Discovery kits
is connected to the physical LAN bus using 13 signals for RGMII. It can be clocked using the 25 MHz from the
STM32MP157x or from a crystal (X2). The default configuration is 25 MHz from the X2 crystal.
The LED LD3 blinks to indicate the data transmission.
For more details about the Ethernet PHY (such as clocking or configuration), refer to its datasheet. The reference
of the Ethernet PHY is available from schematics on the product web page.
6.15.2 Operating voltage
The Ethernet PHY is supplied directly with 3.3 V. It generates its own 1.05 V supply and digital/analog 3.3 V.
UM2637
Gigabit Ethernet
UM2637 - Rev 2
page 24/47
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