CC1150-RTR1 datasheet(37/67 Pages) TI

37 / 67 page

CC1150

SWRS037A

Page 37 of 60

22 General Purpose / Test Output Control Pins

The two digital output pins GDO0 and GDO1 are

general control pins. Their functions are

programmed by IOCFG0.GDO0_CFG

and

IOCFG1.GDO1_CFG

respectively. Table 24

shows the different signals that can be

monitored on the GDO pins. These signals

can be used as an interrupt to the MCU.

GDO1

is the same pin as the SO pin on the SPI

interface, thus the output programmed on this

pin will only be valid when CSn is high. The

default value for GDO1 is 3-stated, which is

useful when the SPI interface is shared with

other devices.

The default value for GDO0 is a 125 - 146 kHz

clock output (XOSC frequency divided by

192). Since the XOSC is turned on at power-

on-reset, this can be used to clock the MCU in

systems with only one crystal. When the MCU

is up and running it can change the clock

frequency by writing to IOCFG0.GDO0_CFG.

An on-chip analog temperature sensor is

enabled by writing the value 128 (0x80h) to

the IOCFG0.GDO0_CFG register. The voltage

on the GDO0 pin is then proportional to

temperature. See section 4.5 on page 9 for

temperature sensor specifications.

CC1150-RTR1 Datasheet(PDF) 37 Page - Texas Instruments