846
PBR
Internal
data bus
RES
RAS, RDWR
PFC
SBYCR
POE
POE0,
POE3
Standby
Bus right
release
PBW
n = 2, 5
m = 0, 3
PBR: Port B read signal
PBW: Port B write signal
RES: Reset signal
PBnDR
Q
C
D
Q PBnMD0
Q PBnMD1
Q HIZ
Q PBnIOR
INTC
IRQm
PBn/
IRQm/
XXX/
YYY
Figure B.21 PBn/IRQm/XXXX/YYYY Block Diagram
