PIC18FXX39 Datasheet, PDF (84/322 Pages) Microchip Technology – Enhanced FLASH Microcontrollers with Single Phase Induction Motor Control Kernel

PIC18FXX39
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
RD TRISA
I/O pin⁽¹⁾
N
VSS
Schmitt
Trigger
Input
Buffer
RD PORTA
Q
D
ENEN
TMR0 Clock Input
Note 1: I/O pin has protection diode to VSS only.
FIGURE 9-3:
ECRA6 or
RCRA6 Enable
Data
Bus
RD LATA
BLOCK DIAGRAM OF
RA6 PIN
WR LATA
or
PORTA
D
Q
CK Q
Data Latch
WR
TRISA
D
Q
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.
DS30485B-page 84
Preliminary
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