Riverdi STM32 Evaluation Board User Manual Rev. 1.4
© 2021 Riverdi
Page 15 of
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Appendix
Hardware Pinouts
#
Pin
Description
MCU Peripheral
25
PF7
User Led 1 (left)
GPIO Output
26
PF8
User Led 2 (right)
GPIO Output
53
PA7
User Button 1
GPIO Input (enable pull-up)
50
PA4
User Button 2
GPIO Input (enable pull-up)
130
PH15
uSD Detect
(hi: uSD present)
GPIO Input (enable pull-up)
40
PA0
STL_TX (UART)
UART4 TX
41
PA1
STL_RX (UART)
UART4 RX
95
PB15
R_MOSI (SPI2)
SPI2 MOSI
94
PB14
R_MISO
SPI2 MISO
93
PB13
R_CLK
SPI2 SCK
92
PB12
R_CS
SPI2 NSS
86
PH9
R_INT
GPIO Input
84
PH10
R_RST
GPIO Output
RiBUS Connector Pinout
The signals listed here are also found on the RiBUS breakout header P3
Pin
Name
Description
1
VDD
Power Supply - 3.3V
2
GND
Ground
3
SPI_SCLK
SPI SCK Signal
4
MISO / IO.1
PI MISO Signal / QSPI data line 1
5
MOSI / IO.0
PI MISO Signal / QSPI data line 0
6
CS
SPI Chip Select Signal
7
INT
Interrupt Signal (Out to MCU)
8
RST / PD
Reset / Power Down Signal
