STMicroelectronics MB1189, User Manual

Page: 22 / 30

Hardware layout and configuration UM1932
22/30 UM1932 Rev 3
4.15 Buttons and LEDs
The black button B1 located bottom side is the reset of the microcontroller
STM32F469NIH6. Refer to the
Figure 5: STM32F469I-DISCO bottom side layout .
The blue button B2 located bottom side is available to be used as a digital input or as
alternate function Wake-up. When the button is depressed the logic state is 1, otherwise the
logic state is 0.
Four LEDs located top side are available for the user. Refer to the Figure 4: STM32F469I-
DISCO top side layout . The LEDs are LD1, LD2, LD3, LD4 from left to right with colors
green, orange, red, blue respectively. To light a LED a low logic state 0 should be written in
the corresponding GPIO.
Table 8 gives the assignment of control ports to the LED indicators.
14 HSSI_CLK_P MIPI-DSI clock lane positive-end input DSI_CK_P
15 GND Ground -
16 HSSI_D1_N MIPI-DSI data lane 1 negative-end input DSI_D1_N
17 NC Not connect -
18 HSSI_D1_P MIPI-DSI data lane 1 positive-end input DSI_D1_P
19 GND Ground -
20 NC/ERR Not connect -
21 VCC Analog circuitry power supply +3V3
22 TE
Tearing effect output pin to synchronize MCU to
frame writing
PJ2
23 LEDK Backlight LED Cathode -
24 LEDA Backlight LED Anode -
25 GND Ground -
Table 7. DSI LCD module connector (CN10) (continued)
CN10
pin
Signal
name
Description
MCU pins
involved
Table 8. Port assignment for control of LED indicators
LED Controlled by MCU port Color
LD1 PG6 Green
LD2 PD4 Orange
LD3 PD5 Red
LD4 PK3 Blue