248
Bits 4 and 3—Area 2 Wait Control (A2W1, A2W0): Specify the number of wait states inserted
in physical space area 2.
•
For Ordinary Memory
Description
Bit 4: A2W0
Bit 3: A2W0
Inserted Wait States
WAIT
Pin
0
0
0
Ignored
1
1
Enabled
1
0
2
Enabled
1
3
Enabled (Initial value)
•
For Synchronous DRAM
Description
Bit 4: A2W1
Bit 3: A2W0
Synchronous DRAM: CAS Latency
0
0
1
1
1
1
0
2
1
3
(Initial value)
Bits 2 to 0—Area 0 Wait Control (A0W2, A0W1, A0W0): Specify the number of wait states
inserted in physical space area 0. Also specify the burst pitch for burst transfer.
Description
First Cycle
Burst Cycle
(Excluding First Cycle)
Bit 2:
A0W2
Bit 1:
A0W1
Bit 0:
A0W0
Inserted
Wait States
WAIT
Pin
Number of States
Per Data Transfer
WAIT
Pin
0
0
0
0
Ignored
2
Enabled
1
1
Enabled
2
Enabled
1
0
2
Enabled
3
Enabled
1
3
Enabled
4
Enabled
1
0
0
4
Enabled
4
Enabled
1
6
Enabled
6
Enabled
1
0
8
Enabled
8
Enabled
1
10
(Initial value)
Enabled
10
Enabled
Содержание SH7709S
Страница 2: ...Hitachi SuperH RISC engine SH7709S Hardware Manual ADE 602 250 Rev 1 0 09 21 01 Hitachi Ltd ...
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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 ...
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