PIC16F526 Datasheet, PDF (31/122 Pages) Microchip Technology – 14-Pin, 8-Bit Flash Microcontroller

FIGURE 6-4:
BLOCK DIAGRAM OF RB4
(with Weak Pull-up and
Wake-up on Change)
RBPU
Data
Bus
D
Q
0
Data
WR
Latch
Port
CK Q
1
W
Reg
TRIS ‘f’
FOSC/4
D
Q
TRIS
Latch
CK Q
I/O
pin⁽¹⁾
Reset
INTOSC/RC/EC
CLKOUT Enable
(Note 2)
RD Port
OSC1
Oscillator
Circuit
PIC16F526
FIGURE 6-5:
BLOCK DIAGRAM OF RB5
Data
Bus
WR
Port
D
Q
Data
Latch
CK Q
I/O
pin⁽¹⁾
W
Reg
TRIS ‘f’
D
Q
TRIS
Latch
CK Q
Reset
(Note 2)
RD Port
OSC2
Oscillator
Circuit
Note 1: I/O pins have protection diodes to VDD and
VSS.
2: Input mode is disabled when pin is used for
oscillator.
Q
D
CK
Pin Change
Note 1: I/O pins have protection diodes to VDD and VSS.
2: Input mode is disabled when pin is used for
oscillator.
 2010 Microchip Technology Inc.
DS41326D-page 31