PIC16F627A Datasheet, PDF (43/168 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontrollers

PIC16F627A/628A/648A
FIGURE 5-14:
BLOCK DIAGRAM OF RB6/T1OSO/T1CKI PIN
RBPU
VDD
P weak pull-up
Data Bus
WR PORTB
WR TRISB
RD TRISB
T1OSCEN
RD PORTB
TMR1 Clock
From RB7
Serial programming clock
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
Schmitt
Trigger
VDD
RB6/
T1OSO/
T1CKI
pin
VSS
TTL
input
buffer
TMR1 oscillator
Set RBIF
Q
D
EN
Q1
From other
RB<7:4> pins
Q
D
Q3
EN
 2002 Microchip Technology Inc.
Preliminary
DS40044A-page 41