Table 5.
I/O configuration of ST morpho connector CN2
Pin number Pin name
Signal name
STM32 GPIO
Function
1
DOWN
KEY_DOWN_PC10
PC10
Joystick down direction (active low)
2
RIGHT
KEY_RIGHT_PC11
PC11
Joystick right direction (active low)
3
UP
KEY_UP_PC12
PC12
Joystick up direction (active low)
4 - 7
-
-
-
Not connected
8
-
-
-
Ground
9 - 15
-
-
-
Not connected
16
-
3V3
-
3.3V power supply
17 – 18
-
-
-
Not connected
19
GND
-
-
Ground
20
GND
-
-
Ground
21
-
-
-
Not connected
22
GND
-
-
Ground
23 – 27
-
-
-
Not connected
28
FMARK
DISP_TE_PA0
PA0
Display tearing effect output pin to synchronize MCU on
frame writing
29
-
-
-
Not connected
30
RESET
DISP_NRESET_PA1
PA1
Reset active low
31 – 34
-
-
-
Not connected
35
SO
SPIB_MISO_PC2_PA6
Flash memory SPI master in/slave out
36
-
-
-
Not connected
37
SI
SPIB_MOSI_PC3_PA12 PC3
Flash memory SPI master out/slave in
38
-
-
-
Not connected
1. STM32 GPIO for
,
,
,
,
,
,
2. STM32 GPIO for
,
UM2750
ST morpho connectors (CN2 and CN3)
UM2750
-
Rev 1
page 12/21