HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 223

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

8.4.4
Wait state control register 2 (WCR2) is a 16-bit read/write register that specifies the number of
wait state cycles inserted for each area. It also specifies the pitch of data access for burst memory
accesses. This allows direct connection of even low-speed memories without an external circuit.
Bit
15
14
13
12
11
10
9
8
7
6
5
Bit Name
A6W2
A6W1
A6W0
A5W2
A5W1
A5W0
A4W2
A4W1
A4W0
A3W1
A3W0
Wait State Control Register 2 (WCR2)
Initial Value R/W
1
1
1
1
1
1
1
1
1
1
1
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
Area 6 Wait Control
Specify the number of wait states inserted into
physical space area 6. Also specify the burst pitch for
burst transfer.
Refer to table 8.6 for details.
Area 5 Wait Control
Specify the number of wait states inserted into
physical space area 5. Also specify the burst pitch for
burst transfer.
Refer to table 8.7 for details.
Area 4 Wait Control
Specify the number of wait states inserted into
physical space area 4.
Refer to table 8.8 for details.
Area 3 Wait Control
Specify the number of wait states inserted into
physical space area 3.
00:
01:
10:
11:
00:
01:
10:
11:
For Ordinary memory
For Synchronus DRAM
Synchronus DRAM :CAS Latency
Inserted Wait States
0
1
2
3
1
1
2
3
Rev. 4.00, 03/04, page 177 of 660
WAIT Pin
Ignored
Enable
Enable
Enable