PIC17C75X Datasheet, PDF (70/320 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM Microcontrollers

PIC17C75X
FIGURE 10-7: BLOCK DIAGRAM OF RB6 PORT PIN
Weak
Pull-Up
DQ
EN
OE
P
0
1
N
Port
Data
Q
D
CK
Q
Note: I/O pins have protection diodes to VDD and Vss.
FIGURE 10-8: BLOCK DIAGRAM OF RB7 PORT PIN
Weak
Pull-Up
D
Q
EENN
OE
P
0
1
N
Port
Data
Q
D
Q ^CK
Note: I/O pins have protection diodes to VDD and Vss.
DS30264A-page 70
Preliminary
Match Signal
from other
port pins
Peripheral Data in
RBPU ^(PORTA<7>)
RBIF
D
Q
CK
Data Bus
RD_DDRB (Q2)
RD_PORTB (Q2)
WR_DDRB (Q4)
WR_PORTB (Q4)
SPI output
SPI output enable
Match Signal
from other
port pins
Peripheral Data in
RBPU ^(PORTA<7>)
RBIF
D
Q
CK
Data Bus
RD_DDRB (Q2)
RD_PORTB (Q2)
WR_DDRB (Q4)
SS output disable
WR_PORTB (Q4)
SPI output
SPI output enable
© 1997 Microchip Technology Inc.