Datasheet

© 2007 Microchip Technology Inc. DS41232D-page 15
PIC12F635/PIC16F636/639
RC3/LFDATA/RSSI/CCLK/SDO RC3 TTL CMOS General purpose I/O.
LFDATA — CMOS Digital output representation of analog input signal to LC pins.
RSSI — Current Received signal strength indicator. Analog current that is
proportional to input amplitude.
CCLK — — Carrier clock output.
SDIO TTL CMOS Input/Output for SPI communication.
RC4/C2OUT RC4 TTL CMOS General purpose I/O.
C2OUT — CMOS Comparator2 output.
RC5 RC5 TTL CMOS General purpose I/O.
V
DDT VDDT D — Power supply for Analog Front-End. In this document, VDDT is
treated the same as V
DD, unless otherwise stated.
V
SST VSST D — Ground reference for Analog Front-End. In this document, VSST is
treated the same as V
SS, unless otherwise stated.
V
DD VDD D — Power supply for microcontroller.
V
SS VSS D — Ground reference for microcontroller.
TABLE 1-3: PIC16F639 PINOUT DESCRIPTIONS (CONTINUED)
Name Function
Input
Type
Output
Type
Description
Legend: AN = Analog input or output CMOS = CMOS compatible input or output D = Direct
HV = High Voltage ST = Schmitt Trigger input with CMOS levels OD = Open Drain
TTL = TTL compatible input XTAL = Crystal