733
A.4
Pin States in Access to Each Address Space
Table A.3
Pin States (Ordinary Memory/Little Endian)
8-Bit Bus Width
16-Bit Bus Width
Pin
Byte/Word/Long-
word Access
Byte Access
(Address 2n)
Byte Access
(Address 2n + 1)
Word/Longword
Access
CS6
to
CS2
,
CS0
Enabled
Enabled
Enabled
Enabled
RD
R
Low
Low
Low
Low
W
High
High
High
High
RD/
WR
R
High
High
High
High
W
Low
Low
Low
Low
BS
Enabled
Enabled
Enabled
Enabled
RAS3U
/PTE[2]
High
High
High
High
RAS3L
/PTJ[0]
High
High
High
High
CASL
/PTJ[2]
High
High
High
High
CASU
/PTJ[3]
High
High
High
High
WE0
/DQMLL
R
High
High
High
High
W
Low
Low
High
Low
WE1
/DQMLU/
WE
R
High
High
High
High
W
High
High
Low
Low
WE2
/DQMUL/
ICIORD
/
R
High
High
High
High
PTK[6]
W
High
High
High
High
WE3
/DQMUU/
ICIOWR
/ R
High
High
High
High
PTK[7]
W
High
High
High
High
CE2A
/PTE[4]
High
High
High
High
CE2B
/PTE[5]
High
High
High
High
CKE/PTK[5]
Disabled
Disabled
Disabled
Disabled
WAIT
Enabled
*
1
Enabled
*
1
Enabled
*
1
Enabled
*
1
IOIS16
/PTG[7]
Disabled
Disabled
Disabled
Disabled
A25 to A0
Address
Address
Address
Address
D7 to D0
Valid data
Valid data
Invalid data
Valid data
D15 to D8
High-Z
*
2
Invalid data
Valid data
Valid data
D31 to D16
High-Z
*
2
High-Z
*
2
High-Z
*
2
High-Z
*
2
Содержание SH7709S
Страница 2: ...Hitachi SuperH RISC engine SH7709S Hardware Manual ADE 602 250 Rev 1 0 09 21 01 Hitachi Ltd ...
Страница 75: ...56 ...
Страница 107: ...88 ...
Страница 125: ...106 ...
Страница 139: ...120 ...
Страница 203: ...184 ...
Страница 245: ...226 ...
Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
Страница 323: ...304 Tp TRr TRrw TRrw CKIO CKE CSn RAS3U RAS3L CASU CASL RD WR Figure 10 28 Synchronous DRAM Auto Refresh Timing ...
Страница 411: ...392 ...
Страница 609: ...590 ...
Страница 635: ...616 ...
Страница 663: ...644 ...
Страница 679: ...660 ...