PIC16F737-I Datasheet, PDF (52/276 Pages) Microchip Technology – 28/40/44-Pin, 8-Bit CMOS Flash Microcontrollers with 10-Bit A/D and nanoWatt Technology

PIC16F7X7
FIGURE 5-1:
BLOCK DIAGRAM OF
RA0/AN0:RA1/AN1 PINS
Data
Bus
WR
PORTA
WR
TRISA
D
Q
VDD
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
P
N
VSS
Analog
Input Mode
RD TRISA
TTL
Input Buffer
Q
D
I/O pin
EN
RD PORTA
To Comparator
To A/D Module Channel Input
FIGURE 5-2:
BLOCK DIAGRAM OF
RA3/AN3/VREF+ PIN
Data
Bus
WR
PORTA
WR
TRISA
D
Q
VDD
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
P
N
VSS
Analog
Input Mode
RD TRISA
TTL
Input Buffer
Q
D
I/O pin
EN
RD PORTA
To Comparator
To A/D Module Channel Input
To A/D Module VREF+ Input
DS30498C-page 50
 2004 Microchip Technology Inc.