PIC18F2331 MICROCHIP [Microchip Technology], PIC18F2331 Datasheet - Page 111

• Manufacturer Part Number: PIC18F2331
• Description: 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 10-5:
 2003 Microchip Technology Inc.
Note 1: Open-drain usually available on RA4 has been removed for this device.
BLOCK DIAGRAM OF RA4
WR TRISA
WR LATA
or
PORTA
Data
Bus
RD TRISA
To CAP3/QEB
Data Latch
RD PORTA
To A/D Converter
D
D
TRIS Latch
CK
CK
RD LATA
PIC18F2331/2431/4331/4431
Q
Q
Q
Q
Preliminary
Q
Analog
Input
Mode
EN
D
V
V
P
N
DD
SS
TTL
Input
Buffer
Schmitt
Trigger
Input
Buffer
RA4
DS39616B-page 109
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