User Manual
Proprietary & Confidential
Page 3
version 1.0
A table of the radio modem pins is provided below, describing the purpose and
functionality of the pins and the max voltage range on the pins.
Pin number
Pin name
Function of pin
Nominal
voltage
Max
voltage
1 VCC Voltage
supply
3.3 V
3.6 V
2
GND
Ground pin
0 V
0 V
3
RST
RESET, active low
3.3V
3.6V
4
BKGD
DEBUG line
3.3 V
3.6 V
5 KBD5
PTA5,
GPIO1,
Interrupt
capable
3.3 V
3.6 V
6
VREFH
Voltage reference pin
2.5V
3.3 V
7 KBD7
PTA7, GPIO3, Interrupt
capable
3.3 V
3.6 V
8 KBD6
PTA6, GPIO2, Interrupt
capable
3.3 V
3.6 V
9 SCL
SCL line of I2C bus
3.3 V
3.6 V
10
SDA
SDA line of I2C bus
3.3 V
3.6 V
11
TXD2
TX line of UART 2
3.3 V
3.6 V
12
RXD2
RX line of UART 2
3.3 V
3.6 V
13
TXD1
TX line of UART 1
3.3 V
3.6 V
14
RXD1
RX line of UART 1
3.3 V
3.6 V
15
ADC2
PTB2, ADC input
3.3 V
3.6 V
16
ADC3
PTB3, ADC input
3.3 V
3.6 V
17
ADC1
PTB1, ADC input
3.3 V
3.6 V
18
ADC0
PTB0, ADC input
3.3 V
3.6 V
