PIC16F819 Microchip Technology Inc., PIC16F819 Datasheet - Page 50

• Manufacturer Part Number: PIC16F819
• Description: 18/20-pin Enhanced Flash Microcontrollers With Nanowatt Technology
• Manufacturer: Microchip Technology Inc.

PIC16F818/819
FIGURE 5-11:
DS39598E-page 48
Note 1: I/O pins have diode protection to V
CCP
RBPU
Data Bus
WR
PORTB
TRISB
WR
To PGM or CCP
2: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
(2)
BLOCK DIAGRAM OF RB3 PIN
RD PORTB
CCP1<M3:M0> = 1000, 1001, 11xx and CCPMX = 0
Data Latch
TRIS Latch
D
D
CK
CK
RD TRISB
Q
Q
0
1
CCP1<M3:M0> = 0100, 0101, 0110, 0111 and CCPMX = 0
DD
or LVP = 1
and V
Q
SS
.
EN
RD PORTB
D
TTL
Input
Buffer
V
P
DD
Weak
Pull-up
I/O pin
(1)
 2004 Microchip Technology Inc.