PIC16C770 Microchip Technology Inc., PIC16C770 Datasheet - Page 39

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

FIGURE 3-9:
2002 Microchip Technology Inc.
Note: The TMR1 oscillator enable (T1OSCEN = 1) overrides the RB6 I/O port and P1C functions.
TMR1 Clock
Serial programming clock
From RB7
Data Bus
WR
WPUB
WR PORTB
WR TRISB
RD TRISB
T1OSCEN
WR
IOCB
BLOCK DIAGRAM OF RB6/T1OSO/T1CKI/P1C
Set RBIF
RD PORTB
IOCB Reg
D
CK
From
RB<7:0> pins
TRIS Latch
Data Latch
WPUB Reg
D
D
CK
CK
D
CK
Q
Q
Trigger
Schmitt
Q
Q
Q
Q
Q
Q
CMOS
RBPU
PIC16C717/770/771
TMR1 Oscillator
Q
Q
V
V
P
N
SS
DD
EN
EN
D
D
TTL
Input
Buffer
V
P
DD
RD Port
weak pull-up
Q3
Q1
V
DS41120B-page 37
DD