SH7708 Datasheet, PDF (589/633 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table A.6 Pin States (Burst ROM/Big-Endian)
8-Bit Bus Width
Pin
CS6 to CS0
RD
Byte/Word/Long- Byte Access
word Access
(Address 2n)
Enabled
Enabled
R Low
Low
RD/WR
W—
R High
—
High
BS
RAS/CE
CAS/CASLL/OE
CASLH
CASHL/CAS2L
CASHH/CAS2H
DQMLL/WE0
W—
Enabled
High
High
High
High
High
R High
—
Enabled
High
High
High
High
High
High
DQMLU/WE1
W—
R High
—
High
W—
DQMUL/WE2/ICIORD R High
—
High
W—
DQMUU/WE3/ICIOWR R High
—
High
MD3/CE2A
MD4/CE2B
MD5/RAS2
W—
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
—
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
CKE
WAIT
IOIS16
Disabled
Enabled^*4
Disabled
Disabled
Enabled^*4
Disabled
A25 to A0
Address
Address
D7 to D0
Valid data
Invalid data
D15 to D8
D23 to D16/
PORT7 to PORT0
D31 to D24
High-Z
High-Z^*5
High-Z^*6
Valid data
High-Z^*5
High-Z^*6
16-Bit Bus Width
Byte Access
Word/Longword
(Address 2n + 1) Access
Enabled
Enabled
Low
Low
—
—
High
High
—
—
Enabled
Enabled
High
High
High
High
High
High
High
High
High
High
High
High
—
—
High
High
—
—
High
High
—
—
High
High
—
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
—
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
Disabled
Enabled^*4
Disabled
Enabled^*4
Disabled
Disabled
Address
Address
Valid data
Valid data
Invalid data
High-Z^*5
Valid data
High-Z^*5
High-Z^*6
High-Z^*6
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