PIC16F628-20P Datasheet, PDF (34/170 Pages) Microchip Technology – FLASH-Based 8-Bit CMOS Microcontroller

PIC16F62X
FIGURE 5-7:
BLOCK DIAGRAM OF RA7/OSC1/CLKIN PIN
To OSC2
Oscillator
Circuit
CLKIN to core
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: INTRC with CLKOUT, and INTRC with I/O.
Schmitt Trigger
Input Buffer
DS40300C-page 32
Preliminary
 2003 Microchip Technology Inc.