Datasheet

PIC12F635/PIC16F636/639
DS41232D-page 6 © 2007 Microchip Technology Inc.
20-Pin Diagram
TABLE 4: 20-PIN SUMMARY
I/O Pin Analog Front-End Comparators Timer Interrupts Pull-ups Basic
RA0 19 — C1IN+ — IOC Y ICSPDAT/ULPWU
RA1 18 — C1IN- — IOC Y VREF/ICSPCLK
RA2 17 — C1OUT T0CKI INT/IOC Y —
RA3
(1)
4— ——IOCY
(2)
MCLR/VPP
RA4 3 — — T1G IOC Y OSC2/CLKOUT
RA5 2 — — T1CKI IOC Y OSC1/CLKIN
RC0 16 — C2IN+ — — — —
RC1 15 — C2IN- — — — CS
RC2 14 ALERT — — — — SCLK
RC3 7 LFDATA/RSSI — — — — CCLK/SDIO
RC4 6 — C2OUT — — — —
RC5 5 — — — — — —
— 8 — — — — — VDDT
(3)
—13 — — ——— VSST
(4)
— 11 LCX — — — — —
—10 LCY — ——— —
— 9 LCZ — — — — —
— 12 LCCOM — — — — —
— 1 — — — — — VDD
—20 — — ——— VSS
Note 1: Input only.
2: Only when pin is configured for external MCLR.
3: V
DDT is the supply voltage of the Analog Front-End section (PIC16F639 only). VDDT is treated as VDD in
this document unless otherwise stated.
4: V
SST is the ground reference voltage of the Analog Front-End section (PIC16F639 only). VSST is treated
as V
SS in this document unless otherwise stated.
SSOP
PIC16F639
VDD
RA5/T1CKI/OSC1/CLKIN
RA4/T1G/OSC2/CLKOUT
RA3/MCLR
/VPP
RC5
RC4/C2OUT
RC3/LFDATA/RSSI/CCLK/SDIO
V
DDT
(3)
LCZ
LCY
VSS
RA0/C1IN+/ICSPDAT/ULPWU
RA1/C1IN-/V
REF/ICSPCLK
RA2/TOCKI/INT/C1OUT
RC0/C2IN+
RC1/C2IN-/CS
RC2/SCLK/ALERT
VSST
(4)
LCCOM
LCX
1
2
3
4
20
19
18
17
5
6
7
16
15
14
8
9
10
13
12
11