PIC16C620 Microchip Technology, PIC16C620 Datasheet - Page 26

• Manufacturer Part Number: PIC16C620
• Description: EPROM-Based 8-Bit CMOS Microcontroller
• Manufacturer: Microchip Technology

PIC16C62X
FIGURE 5-3:
FIGURE 5-4:
DS30235G-page 26
Data
bus
WR
PortA
WR
TRISA
Data
bus
WR
PortA
WR
TRISA
RD PORTA
RD PORTA
Note:
Note:
To Comparator
TMR0 Clock Input
D
D
TRIS Latch
D
D
TRIS Latch
Data Latch
Data Latch
CK
CK
CK
CK
RD TRISA
RD TRISA
I/O pins have protection diodes to VDD and VSS
RA4 has protection diodes to VSS only
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
Preliminary
Q
Q
EN
EN
Input Mode
D
D
Schmitt Trigger
Schmitt Trigger
Analog
Input Buffer
Input Buffer
V
P
V
V
N
N
DD
SS
SS
1998 Microchip Technology Inc.
RA3 Pin
RA4 Pin