PIC18CXX2_13 Datasheet, PDF (78/304 Pages) Microchip Technology – High Performance Microcontrollers with 10-bit A/D

PIC18CXX2
FIGURE 8-2:
BLOCK DIAGRAM OF
RA4/T0CKI PIN
Data
Bus
WR LATA
or
PORTA
WR TRISA
RD LATA
DQ
CK Q
Data Latch
DQ
CK Q
TRIS Latch
N
I/O pin⁽¹⁾
VSS
Schmitt
Trigger
Input
Buffer
RD TRISA
Q
D
RD PORTA
TMR0 Clock Input
ENEN
Note 1: I/O pins have protection diodes to VDD and VSS.
FIGURE 8-3:
BLOCK DIAGRAM OF RA6
ECRA6 or
RCRA6 Enable
Data
Bus
RD LATA
D
Q
WR LATA
or
CK Q
PORTA
Data Latch
D
Q
WR
TRISA
CK Q
TRIS Latch
Data Bus
RD TRISA
VDD
P
N
I/O pin⁽¹⁾
VSS
ECRA6 or
RCRA6
Enable
TTL
Input
Buffer
Data Bus
Q
D
EN
RD PORTA
Note 1: I/O pins have protection diodes to VDD and VSS.
DS39026D-page 78
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