SH7708 Datasheet, PDF (579/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table A.5 Pin States (Burst ROM/Little-Endian) (cont)
32-Bit Bus Width
Pin
CS6 to CS0
RD
Byte
Access
(Address
4n)
Byte
Access
(Address
4n + 1)
Byte
Access
(Address
4n + 2)
Byte
Access
(Address
4n + 3)
Word
Access
(Address
4n)
Word
Access
(Address
4n + 2)
Longword
Access
Enabled Enabled Enabled Enabled Enabled Enabled Enabled
R Low
Low
Low
Low
Low
Low
Low
RD/WR
W—
R High
—
High
—
High
—
High
—
High
—
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
—
Enabled
High
High
High
High
High
High
—
Enabled
High
High
High
High
High
High
—
Enabled
High
High
High
High
High
High
—
Enabled
High
High
High
High
High
High
—
Enabled
High
High
High
High
High
High
DQMLU/WE1
W—
R High
—
High
—
High
—
High
—
High
—
High
—
High
DQMUL/WE2/ICIORD
W—
R High
—
High
—
High
—
High
—
High
—
High
—
High
W—
DQMUU/WE3/ICIOWR R High
—
High
—
High
—
High
—
High
—
High
—
High
MD3/CE2A
MD4/CE2B
MD5/RAS2
W—
—
—
—
—
—
—
High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or
high^*1
high^*1
high^*1
high^*1
high^*1
high^*1
high^*1
High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or
high^*2
high^*2
high^*2
high^*2
high^*2
high^*2
high^*2
High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or High-Z or
high^*3
high^*3
high^*3
high^*3
high^*3
high^*3
high^*3
CKE
WAIT
IOIS16
Disabled Disabled Disabled Disabled Disabled Disabled Disabled
Enabled^*4 Enabled^*4 Enabled^*4 Enabled^*4 Enabled^*4 Enabled^*4 Enabled^*4
Disabled Disabled Disabled Disabled Disabled Disabled Disabled
A25 to A0
Address Address Address Address Address Address Address
D7 to D0
Valid
data
Invalid
data
Invalid
data
Invalid
data
Valid
data
Invalid
data
Valid
data
565