13.2.7 Wait Control Register 3 (WCR3)
Wait control register 3 (WCR3) is a 32-bit readable/writable register that specifies the cycles
inserted in the setup time from the address until assertion of the write strobe, and the data hold
time from negation of the strobe, for each area. This enables low-speed memory to be connected
without using external circuitry.
WCR3 is initialized to H'07777777 by a power-on reset, but is not initialized by a manual reset or
in standby mode.
Bit:
Bit name:
Initial value:
R/W:
31
—
0
30
—
0
29
—
0
28
—
0
27
—
0
26
A6S0
1
25
A6H1
1
24
A6H0
1
R
R
R
R
R
R/W
R/W
R/W
Bit:
Bit name:
Initial value:
R/W:
23
—
0
22
A5S0
1
21
A5H1
1
20
19
18
17
A4H1
1
16
A4H0
1
A5H0 A4RDH* A4S0
1
0
1
R
R/W
R/W
R/W
R/W*
R/W
R/W
R/W
Bit:
Bit name:
Initial value:
R/W:
15
—
0
14
A3S0
1
13
A3H1
1
12
A3H0
1
11
—
0
10
A2S0
1
9
A2H1
1
8
A2H0
1
R
R/W
R/W
R/W
R
R/W
R/W
R/W
Bit:
7
6
5
A1H1
1
4
A0H0
1
3
—
0
2
A0S0
1
1
A0H1
1
0
A0H0
1
Bit name: A1RDH* A1S0
Initial value:
R/W: R/W*
Note: * SH7750R only
0
1
R/W
R/W
R/W
R
R/W
R/W
R/W
Bits 31 to 27, 23, 19*, 15, 11, 7*, and 3—Reserved: These bits are always read as 0, and should
only be written with 0.
Note: * SH7750R only
Rev. 6.0, 07/02, page 351 of 986
RENESAS [ RENESAS TECHNOLOGY CORP ]
