PIC18F2331_07 Datasheet, PDF (134/400 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: BLOCK DIAGRAM OF RE2:RE0
Data Bus
WR LATE
or PORTE
WR TRISE
RD LATE
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD TRISE
VDD
P
N
VSS
Analog
Input
Mode
RD PORTE
To A/D Converter Channel AN6, AN7 or AN8
Q
D
EN
RE<2:0> Pins
Schmitt
Trigger
FIGURE 10-29:
BLOCK DIAGRAM OF RE3
MCLR/VPP/RE3⁽¹⁾
Data Bus
RD TRISE
RD LATE
MCLRE
Schmitt
Trigger
Latch
Q
D
EN
RD PORTE
High-Voltage Detect
Internal MCLR
MCLRE
FILTER
HV
Low-Level
MCLR Detect
Note 1: Pin requires special protection due to HV.
DS39616C-page 132
Preliminary
© 2007 Microchip Technology Inc.