ODIN-W2 series - System integration manual
UBX-14040040 - R20 System description Page 11 of 43
C1-Public
Function Pin name Pin No. GPIO
id
Mbed pin STM32
pin
Signal description Remarks
Power VCC A4 Module power
supply.
3.0 – 3.6 V power supply.
V_INT A2 Regulated output
voltage for external
interface supply.
1.8 V, max output current
100mA. The maximum output
current can be limited by the
internal current consumption of
the V_INT rail.
GND A3, C1, C3,
C4, C7, D7
All GND pads must
be connected to
ground.
System
IO
RESET_N A1 External reset input.
Internal active pull-up to V_INT.
SWITCH_0 A6 SW0 PF2 System Input Signal
Active low. The module will
revert to factory settings if both
SWITCH_1=’0’
and SWITCH_0=’0’ for 10 sec
startup (RESET_N pin is
released or power is applied).
RED A7 A5 / LED1 /
LED_RED
PE_0 Logic Red LED
Signal.
Active low.
GREEN/
SWITCH_1
A8 LED2 /
LED_GRE /
SW1
PB_6 Logic Green LED
Signal. System
Input Signal
Active low.
The GREEN signal is not valid
until 500 ms after the startup
(RESET_N pin is released or
power is applied).
If the level on this pin is pulled-
down during start-up the unit
goes back to default serial
settings. The SWITCH_1 input
is only active during the first
500ms after startup.
The module will revert to factory
settings if both SWITCH_1=’0’
and SWITCH_0=’0’ for 10 sec
startup.
BLUE A9 D5 / LED_BLU PB_8 Logic Blue LED
Signal.
Active low.
Clock LPO_CLK C16 14 A3 PF_7 Low Power
Oscillator clock
input
The modules require an external
32.768 kHz clock for low power
modes. Should be left
unconnected if not used.
UART UART_RXD A13 D2 PA_10 UART Receive.
UART_TXD A11 D8 PA_9 UART Transmit.
UART_RTS A12 28 D4 PA_12 UART Request To
Send, Hardware
flow control.
Active low.
UART_CTS A10 27 D3 PA_11 UART Clear To
Send, Hardware
flow control.
Active low.
UART_DTR A5 A2 PC2 UART Data
Terminal Ready
System Output
Signal
Active low.
Is used as a System IO
UART_DSR A18 A1 PA_3 UART Data Set
Ready.
Active low. Can also be used as a
System IO.
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