PIC18LF252-ISP Datasheet, PDF (90/332 Pages) Microchip Technology – High-Performance, Enhanced Flash Microcontrollers with 10-Bit A/D

PIC18FXX2
FIGURE 9-2:
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
I/O pin⁽¹⁾
N
VSS
Schmitt
Trigger
Input
Buffer
RD TRISA
Q
D
RD PORTA
ENEN
TMR0 Clock Input
Note 1: I/O pin has protection diode to VSS only.
FIGURE 9-3:
BLOCK DIAGRAM OF
RA6 PIN
ECRA6 or
RCRA6 Enable
Data
Bus
RD LATA
D
Q
WR LATA
or
PORTA
CK Q
Data Latch
D
Q
WR
TRISA
CK Q
TRIS Latch
VDD
P
N I/O pin⁽¹⁾
VSS
RD TRISA
ECRA6 or
RCRA6
Enable
TTL
Input
Buffer
Q
D
EN
RD PORTA
Note 1: I/O pins have protection diodes to VDD and VSS.
DS39564C-page 88
© 2006 Microchip Technology Inc.