Datasheet

 2002-2013 Microchip Technology Inc. DS30487D-page 55
PIC16F87/88
FIGURE 5-6: BLOCK DIAGRAM OF RA6/OSC2/CLKO PIN
Data
Bus
QD
Q
CK
P
N
WR
PORTA
WR
TRISA
Data Latch
TRIS Latch
RD TRISA
RD PORTA
V
SS
VDD
RA6/OSC2/CLKO pin
Q
D
Q
CK
DQ
EN
Oscillator
Circuit
From OSC1
(FOSC = 1x0, 011)
P
N
VSS
VDD
CLKO (FOSC/4)
VDD
Note 1: I/O pins have protection diodes to VDD and VSS.
2: CLKO signal is 1/4 of the F
OSC frequency.
(FOSC = 1x0, 011)
(FOSC = 1x1)
VSS
Schmitt Trigger
Input Buffer