SH7708 Datasheet, PDF (599/625 Pages) Renesas Technology Corp – SuperH™ RISC engine

Table A.12 Pin States (Pseudo-SRAM/Big-Endian)
Byte Access
Pin
(Address 2n)
CS6 to CS0
Enabled
RD
R High
W High
RD/WR
R High
W Low
BS
Enabled
RAS/CE
Low
CAS/CASLL /OE
Low
CASLH
High
CASHL/CAS2L
High
CASHH /CAS2H
High
DQMLL/WE0
R High
W High
DQMLU/WE1
R High
W Low
DQMUL/WE2/ICIORD R High
W High
DQMUU/WE3/ICIOWR R High
MD3/CE2A
MD4/CE2B
W High
High-Z or high^*1
High-Z or high^*2
MD5/RAS2
High-Z
CKE
Disabled
WAIT
Disabled
IOIS16
Disabled
A25 to A0
Address
D7 to D0
Invalid data
D15 to D8
D23 to D16/
PORT7 to PORT0
Valid data
High-Z^*3
D31 to D24
High-Z^*4
16-Bit Bus Width
Byte Access
(Address 2n + 1)
Enabled
High
High
High
Low
Enabled
Low
Low
High
High
High
High
Low
High
High
High
High
High
High
High-Z or high^*1
High-Z or high^*2
High-Z
Disabled
Disabled
Disabled
Address
Valid data
Invalid data
High-Z^*3
High-Z^*4
Word/Longword
Access
Enabled
High
High
High
Low
Enabled
Low
Low
High
High
High
High
Low
High
Low
High
High
High
High
High-Z or high^*1
High-Z or high^*2
High-Z
Disabled
Disabled
Disabled
Address
Valid data
Valid data
High-Z^*3
High-Z^*4
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