4
Name
Pin function
Description
GND
Ground
The exposed die attach pad must be connected to a solid
ground plane underneath the chip
VCC
Power
2.0-3.6V analog power supply connection
VBAT
Analog input
Battery voltage supervisor (threshold level programmable by
external resistor to positive battery terminal)
SCL
GIO10
Digital I/O
1
I2C master clock line. Must be connected to external pull-up
General-purpose digital I/O pin 10
SDA
GIO11
Digital I/O
1
I2C master clock line. Must be connected to external pull-up
General-purpose digital I/O pin 11
GIO12
Digital I/O
1
General-purpose digital I/O pin 12
GIO13
Digital I/O
1
General-purpose digital I/O pin 13
PAEN
Digital I/O
2
Control external PA
EN
Digital I/O
2
Control external LNA
XANTN
USBN
Digital I/O
1
CC85x0: DO NOT CONNECT (Future FW: Controlling
external antenna switch) CC85x1: USB D- data line
XANTP
USBP
Digital I/O
1
CC85x0: DO NOT CONNECT (Future FW: Controlling
external antenna switch) CC85x1: USB D+ data line
CSN
Digital Input
(pull-up)
Serial SPI configuration interface, active low chip select
SCLK
Digital I/O
1
Serial SPI configuration interface, clock input/output
MOSI
Digital I/O
1
Serial SPI configuration interface, master data output, slave
data input
MISO
Digital I/O
1
Serial SPI configuration interface, master data input, slave
data output
GIO1
Digital I/O
1
General-purpose digital I/O pin 1
Configurable with PurePath™ Wireless Configurator
GIO2
Digital I/O
1
General-purpose digital I/O pin 2
GIO3
Digital I/O
2
General-purpose digital I/O pin 3
Configurable with PurePath™ Wireless Configurator
RSTN
Digital Input
(pull-up)
Active-low device reset
MCLK
GIO4
Digital I/O
1
Master clock output for external audio devices
General-purpose digital I/O pin 4
BCLK
GIO5
Digital I/O
1
I2S/DSP audio interface bit clock (in/out)
General-purpose digital I/O pin 5
Pin Assignment
