PIC18F2331 Datasheet, PDF (112/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 10-6:
BLOCK DIAGRAM OF RA5
RD LATA
Data
Bus
D
Q
VDD
WR LATA
or
CK Q
P
PORTA
Data Latch
D
Q
N
WR TRISA
CK Q
TRIS Latch
RD TRISA
VSS
Analog
Input
Mode or
LVDIN
Enabled
Q
D
EN
RD PORTA
I/O
Pin
TTL
Input
Buffer
To A/D Converter/LVD Module Input
FIGURE 10-8:
BLOCK DIAGRAM OF RA7
Data
Bus
INTOSC Enable
RD LATA
TO
OSCILLATOR
WR LATA
or
PORTA
DQ
CK Q
Data Latch
DQ
CK Q
TRIS Latch
RD TRISA
VDD
P
N
VSS
INTOSC
w/RA7 Enable
I/O
Pin
TTL
Input
Buffer
RD PORTA
QD
EN
FIGURE 10-7:
BLOCK DIAGRAM OF RA6
Data
Bus
ECRA6 or RCRA6
Enable
RD LATA
TO
OSCILLATOR
WR LATA
or
PORTA
DQ
CK Q
Data Latch
DQ
CK Q
TRIS Latch
RD TRISA
VDD
P
N
VSS
ECRA6 or
RCRA6
Enable
I/O
Pin
TTL
Input
Buffer
RD PORTA
QD
EN
DS39616B-page 110
Preliminary
 2003 Microchip Technology Inc.