SH7727 Datasheet, PDF (1084/1109 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7700 Series

Appendix A Pin Functions
Table A.7 Pin Status (Synchronous DRAM/Little Endian)
32-Bit Bus Width
Byte
Byte
Byte
Byte
Word
Word
Pin
Access Access Access Access Access Access Longword
(Address (Address (Address (Address (Address (Address Access
4n)
4n+1)
4n+2)
4n+3)
4n)
4n+2)
CS6 to CS2, CS0
Enabled Enabled Enabled Enabled Enabled Enabled Enabled
RD
R High
High
High
High
High
High
High
W High
High
High
High
High
High
High
RD/WR
R High
High
High
High
High
High
High
W Low
Low
Low
Low
Low
Low
Low
BS
Enabled Enabled Enabled Enabled Enabled Enabled Enabled
RAS3
Low/
High^*1
Low/
High^*1
Low/
High^*1
Low/
High^*1
Low/
High^*1
Low/
High^*1
Low/
High^*1
CAS
High/
Low^*1
High/
Low^*1
High/
Low^*1
High/
Low^*1
High/
Low^*1
High/
Low^*1
High/
Low^*1
WE0/DQMLL
R Low
High
High
High
Low
High
Low
W Low
High
High
High
Low
High
Low
WE1/DQMLU/WE
R High
Low
High
High
Low
High
Low
W High
Low
High
High
Low
High
Low
WE2/DQMUL/ICIORD R High
High
Low
High
High
Low
Low
W High
High
Low
High
High
Low
Low
WE3/DQMUU/ICIOWR R High
High
High
Low
High
Low
Low
W High
High
High
Low
High
Low
Low
CE2A
High
High
High
High
High
High
High
CE2B
CKE
High
High^*2
High
High^*2
High
High^*2
High
High^*2
High
High^*2
High
High^*2
High
High^*2
WAIT
Disabled Disabled Disabled Disabled Disabled Disabled Disabled
IOIS16
Disabled Disabled Disabled Disabled Disabled Disabled Disabled
A25 to A0
Address Address Address Address Address Address Address
command command command command command command command
D7 to D0
Valid data Invalid
data
Invalid
data
Invalid
data
Valid data Invalid
data
Valid data
D15 to D8
Invalid
data
Valid data Invalid
data
Invalid
data
Valid data Invalid
data
Valid data
D23 to D16
Invalid
data
Invalid
data
Valid data Invalid
data
Invalid
data
Valid data Valid data
D31 to D24
Invalid
data
Invalid
data
Invalid
data
Valid data Invalid
data
Valid data Valid data
Notes: 1. Low 32MB access/High 32MB access
2. Normally High, but Low during self-refresh.
Rev. 5.00 Dec 12, 2005 page 1012 of 1034
REJ09B0254-0500