PIC18F2331 Datasheet, PDF (132/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 10-28: RE2:RE0 BLOCK DIAGRAM
Data Bus
WR LATE
or
PORTE
WR TRISE
RD LATE
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD TRISE
RD PORTE
To A/D Converter ch. AN6 or AN7 or AN8
VDD
P
N
VSS
Analog
Input
Mode
Q
D
EN
Schmitt
TTL
Trigger
RE<0:2>
Pins
FIGURE 10-29:
RE3 BLOCK DIAGRAM
MCLR/VPP/RE3
Data Bus
MCLRE
RD TRISE
Schmitt
Trigger
RD LATE
Latch
QD
EN
RD PORTE
High Voltage Detect
Internal MCLR
MCLRE
FILTER
HV
Low Level
MCLR Detect
Note 1: Pin requires special protection due to HV.
DS39616B-page 130
Preliminary
 2003 Microchip Technology Inc.