PIC16F627A Datasheet, PDF (36/168 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontrollers

PIC16F627A/628A/648A
FIGURE 5-7:
BLOCK DIAGRAM OF RA7/OSC1/CLKIN PIN
To Clock Circuits
VDD
Data Bus
D
Q
WR PORTA
WR TRISA
CK
Q
Data Latch
D
Q
CK
Q
TRIS Latch
RA7/OSC1/CLKIN Pin
VSS
RD TRISA
FOSC = 100, 101⁽¹⁾
RD PORTA
Q
D
EN
Note 1: INTOSC with CLKOUT, and INTOSC with I/O.
Schmitt Trigger
Input Buffer
DS40044A-page 34
Preliminary
 2002 Microchip Technology Inc.