PIC17C44 Datasheet, PDF (56/241 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

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