SH7708 Datasheet, PDF (575/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table A.4 Pin States (Normal Memory/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 High
R High
High
High
BS
RAS/CE
CAS/CASLL /OE
CASLH
CASHL/CAS2L
CASHH /CAS2H
DQMLL/WE0
W Low
Enabled
High
High
High
High
High
R High
Low
Enabled
High
High
High
High
High
High
DQMLU/WE1
W Low
R High
High
High
DQMUL/WE2/ICIORD
W High
R High
Low
High
W High
DQMUU/WE3/ICIOWR R High
High
High
MD3/CE2A
MD4/CE2B
MD5/RAS2
W High
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
High
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
High
Enabled
Low
Low
High
High
High
High
Low
Low
Enabled
Enabled
High
High
High
High
High
High
High
High
High
High
High
High
Low
Low
High
High
High
Low
High
High
High
High
High
High
High
High-Z or high^*1
High-Z or high^*2
High-Z or high^*3
High
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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