User's Manual

February 2017
DocID0xxxxx Rev 0.xx 9/27
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change
without notice. ww w.st.com
2.7 Pin assignment
Pin
Name
Type
Description
STM32L151RDY6
pin
(1)
TP1
I2C1_SCL
(4)
I/O
I
2
C clock
(3)
or general purpose input/output
PB8
TP2
SWDIO
I/O
Serial wire I/O
(2)
PA13
TP3
GPIO_11
I/O
General purpose input/output
PB7
TP4
GPIO_12
I/O
General purpose input/output
PC12
TP5
GPIO_13
I/O
General purpose input/output
PA15
TP6
RESET
I
Reset input, active low, internal pull-up
NRST
TP9
I2C1_SDA
(4)
I/O
I
2
C data in/out
(3)
or general purpose
input/output
PB9
TP10
STAT_LED
O
Status indicator LED
PB6
TP11
USB_DEV_CONN
I
Pull high, if USB is used/connected,
pull low, if USB is not used/connected
PB5
TP12
GPIO_8
I/O
General purpose input/output
PB4
TP13
GPIO_10
I/O
General purpose input/output
PB3
TP14
PWR_MON
O
Power ON monitor, goes high if the module
is powered on, goes low if the module is not
powered
PC11
TP15
GPIO_14
I/O
General purpose input/output
PD2
TP16
SWCLK
I
Serial wire clock
(2)
PA14
TP17
GND
Power
Ground
-
TP18
USB_P / RTS
I/O
USB DATA- or Request to send signal from
DTE, depending on firmware configuration
PA12
TP19
USB_N / CTS
I/O
USB DATA+ or Clear to send signal to DTE,
depending on firmware configuration
PA11
TP20
UART2_RX
I
Serial data input from DTE
PA10
TP21
UART2_TX
O
Serial data output to DTE
PA9
TP22
GPIO_9
I/O
General purpose input/output
PC6
TP23
SPI_MISO
(4)
I/O
SPI MISO or general purpose input/output
PB14
TP24
SPI_MOSI
(4)
I/O
SPI MOSI or general purpose input/output
PB15
TP25
RI
O
Ring indicator to DTE
PB12
TP26
SPI_CLK
(4)
I/O
SPI clock or general purpose input/output
PB13
TP27
VDD
Power
Supply input voltage
-
TP28
DTR
I
Data terminal ready from DTE
PB2
TP29
TX_AUX
O
Auxiliary serial data output for debug/test
PB10
TP30
ADC_01
I/O
ADC input or general purpose input/output
PB0
TP31
GPIO_6
I/O
General purpose input/output
PC5
TP32
GPIO_5
I/O
General purpose input/output
PC4
TP33
ON/OFF
I
Input for switching ON or OFF the module
PA0
TP34
UART1_RX
I/O
Serial data input
PA3
TP35
UART1_TX
I/O
Serial data output
PA2
TP36
ALARM/GPIO_1
I/O
Alarm output or general purpose
input/output
PCO
TP37
GPIO_4
I/O
General purpose input/output
PC3
TP38
GPIO_2/RF_TX_MON
O
RF transmitter ON monitor or general
purpose input/output
PC1
TP39
RX_AUX
I
Auxiliary serial data input for debug/test
PB11
TP40
ADC_01
I/O
ADC input or general purpose input/output
PB1
TP41
RESERVED
-
Must be left unconnected (for future uses)
PA8
TP42
GPIO_7
I/O
General purpose input/output
PA1