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