PIC16C621A Microchip Technology Inc., PIC16C621A Datasheet - Page 28

• Manufacturer Part Number: PIC16C621A
• Description: Eprom-based 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

PIC16C62X
FIGURE 5-3:
FIGURE 5-4:
DS30235J-page 26
Data
Bus
WR
PORTA
WR
TRISA
Data
Bus
WR
PORTA
WR
TRISA
RD PORTA
RD PORTA
To Comparator
TRIS Latch
D
D
Data Latch
TMR0 Clock Input
D
D
TRIS Latch
Data Latch
CK
CK
CK
CK
RD TRISA
RD TRISA
BLOCK DIAGRAM OF RA3 PIN
BLOCK DIAGRAM OF RA4 PIN
Q
Q
Q
Q
Q
Q
Q
Q
Comparator Output
Comparator Output
Comparator Mode = 110
Comparator Mode = 110
Q
Q
EN
EN
Input Mode
D
D
Schmitt Trigger
Schmitt Trigger
Analog
Input Buffer
Input Buffer
 2003 Microchip Technology Inc.
V
P
V
N
V
N
DD
SS
SS
V
V
SS
SS
V
DD
RA4 Pin
RA3 Pin