Renesas Stereo System SH7709S Manuale Utente
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Rev. 5.00, 09/03, page 227 of 760
Pin Name
Signal
I/O
Description
Data enable 3
WE3
/DQMUU/
ICIOWR
O
When memory other than synchronous DRAM and
PCMCIA is used, D31–D24 write strobe signal.
When synchronous DRAM is used, selects D31–
D24. When PCMCIA is used, strobe signal
indicating I/O write.
PCMCIA is used, D31–D24 write strobe signal.
When synchronous DRAM is used, selects D31–
D24. When PCMCIA is used, strobe signal
indicating I/O write.
Read
RD
O
Strobe signal indicating read cycle
Wait
WAIT
I
Wait state request signal
Clock enable
CKE
O
Clock enable control signal for synchronous DRAM
IOIS16
IOIS16
I
Signal indicating PCMCIA 16-bit I/O. Valid only in
little-endian mode.
little-endian mode.
Bus release
request
request
BREQ
I
Bus release request signal
Bus release
acknowledgment
acknowledgment
BACK
O
Bus release acknowledge signal
Mask ROM chip
select
select
MCS[0]
–
MCS[7]
O
Chip select signal for mask ROM connected to area
0 or 2.
0 or 2.