PIC16LF877A-I Datasheet, PDF (44/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers

PIC16F87XA
FIGURE 4-2:
BLOCK DIAGRAM OF RA4/T0CKI PIN
CMCON<2:0> = x01 or 011
C1OUT
Data Bus
Data Latch
DQ
1
WR PORTA
CK Q
0
TRIS Latch
DQ
WR TRISA
CK Q
N
I/O pin⁽¹⁾
VSS
Schmitt
Trigger
Input
Buffer
RD TRISA
QD
RD PORTA
TMR0 Clock Input
ENEN
Note 1: I/O pin has protection diodes to VSS only.
FIGURE 4-3:
BLOCK DIAGRAM OF RA5 PIN
CMCON<2:0> = 011 or 101
C2OUT
Data Bus
Data Latch
DQ
1
WR PORTA
CK Q
0
TRIS Latch
DQ
WR TRISA
CK Q
RD TRISA
RD PORTA
A/D Converter or SS Input
VDD
P
N
Analog
IIP Mode
VSS
I/O pin⁽¹⁾
TTL
Input
Buffer
QD
ENEN
Note 1: I/O pin has protection diodes to VDD and VSS.
DS39582B-page 42
 2003 Microchip Technology Inc.