Operating Voltage; Led Interface; Buttons; Description - ST STM32MP157C-DK2 User Manual

7.10.2

Operating voltage

All LEDs are driven by the I/O level; they are operating in the 3.3 V voltage range.
7.10.3

LED interface

Table 13 describes the I/O configuration of the LED interface.
I/O
PA14
PA13
PH7
PD11
7.11

Buttons

7.11.1

Description

The STM32MP157A-DK1 and STM32MP157C-DK2 Discovery kits provide four types of buttons:
• Wake-up button (B1)
– Allows the platform to be woken up from any low-power mode
– Connected to STPMIC1 PONKEY, which generates a wake up signal on STM32MP157x PA0
• Reset button (B2)
– Used to reset the Discovery kit
• USER1 button (B3)
– Used at boot time by U-Boot to enter the USB programming mode
• USER2 button (B4)
– Used at boot time by U-Boot to enter the Android
7.11.2

I/O interface

Table 14 describes the I/O configuration for the physical user interface.
I/O
NRST
-
PA13
PA14
7.12 ®

HDMI

7.12.1 Description
The STM32MP157A-DK1 and STM32MP157C-DK2 Discovery kits offer an HDMI
through the use of the Lattice Semiconductor SiI9022A HDMI
UM2534 - Rev 1
Table 13. I/O configuration of the LED interfaces
PA14 is connected to the green LED LD4. Active Low.
PA13 is connected to the red LED LD6. Active Low.
PH7 is connected to the orange LED LD7. Active High.
PD11 is connected to the blue LED LD8. Active High.
Table 14. I/O configuration for the physical user interface
Reset button (B2). Aactive Low.
Wake-up button (B1). Connected to the PONKEYn pin of the STPMIC1
USER2 user button (B4)
USER1 user button (B3)
Configuration
®
Fastboot mode
Configuration
®
connection for a TV monitor
®
transmitter.
UM2534
Buttons
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