Datasheet

PIC17C4X
DS30412C-page 56  1996 Microchip Technology Inc.
FIGURE 9-5: BLOCK DIAGRAM OF RB3 AND RB2 PORT PINS
Note: I/O pins have protection diodes to VDD and Vss.
Data Bus
Q
D
CK
Q
D
CK
R
Weak
Pull-Up
Port
Input Latch
Port
Data
OE
PWM_select
PWM_output
WR_PORTB (Q4)
WR_DDRB (Q4)
RD_PORTB (Q2)
RD_DDRB (Q2)
RBIF
RBPU
Match Signal
from other
port pins
(PORTA<7>)
Peripheral Data in