PIC16C770 Microchip Technology Inc., PIC16C770 Datasheet - Page 40

• Manufacturer Part Number: PIC16C770
• Description: 18/20-pin, 8-bit Cmos Microcontrollers With 10/12-bit A/d
• Manufacturer: Microchip Technology Inc.

PIC16C717/770/771
FIGURE 3-10: BLOCK DIAGRAM OF THE RB7/T1OSI/P1D
DS41120B-page 38
Note: The TMR1 oscillator enable (T1OSCEN = 1) overrides the RB7 I/O port and P1D functions.
Data Bus
WR
WPUB
T10SCEN
RD PORTB
WR
IOCB
Serial programming input
RBPU
WR PORTB
WR TRISB
RD TRISB
Schmitt Trigger
IOCB Reg
D
Set RBIF
CK
WPUB Reg
TRIS Latch
Data Latch
D
CK
D
D
CK
CK
Q
Q
From
RB<7:0> pins
Q
Q
Q
Q
Q
Q
V
P
DD
weak pull-up
Q
Q
EN
EN
D
D
To RB6
T1OSCEN
TMR1 Oscillator
V
V
P
N
SS
DD
RD Port
2002 Microchip Technology Inc.
TTL
Input
Buffer
Q3
Q1
V
DD