ZHCSJU4I November 2006 – September 2018 CC1020
PRODUCTION DATA.
The two digital output pins, PA_EN and LNA_EN, can be used as two general control signals by setting EXT_PA = 0 and EXT_LNA = 0. The output value is then set directly by the value written to EXT_PA_POL and EXT_LNA_POL.
The LOCK pin can also be used as a general-purpose output pin. The LOCK pin is controlled by LOCK_SELECT[3:0] in the LOCK register. The LOCK pin is low when LOCK_SELECT[3:0] = 0000, and high when LOCK_SELECT[3:0] = 0001.
These features can be used to save I/O pins on the microcontroller when the other functions associated with these pins are not used.