HD64F2149 Datasheet, PDF (992/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Mode 1
Hardware
standby
CS
IOR
External
address
write
P37
Mode 2, 3
EXPE
LPCE
HI12E
RP3P
Reset
R
QD
P37PCR
C
WP3P
Reset
R
QD
P37DDR
C
WP3D
Reset
CS
IOW
R
QD
P37DR
C
WP3
RP3
External address read
WP3P : Write to P3PCR
WP3D : Write to P3DDR
WP3 : Write to port 3
RP3P : Read P3PCR
RP3 : Read port 3
Figure C.7 Port 3 Block Diagram (Pin P37)
HIF : LPC
SERIRQ output
Output enable
SERIRQ input
958