D12320VF25V Datasheet, PDF (181/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

WCRL
Bit
:
Initial value :
R/W
:
7
W31
1
R/W
6
W30
1
R/W
5
W21
1
R/W
4
W20
1
R/W
3
W11
1
R/W
Section 6 Bus Controller
2
W10
1
R/W
1
W01
1
R/W
0
W00
1
R/W
Bits 7 and 6—Area 3 Wait Control 1 and 0 (W31, W30): These bits select the number of
program wait states when area 3 in external space is accessed while the AST3 bit in ASTCR is set
to 1.
Bit 7
W31
0
1
Bit 6
W30
0
1
0
1
Description
Program wait not inserted when external space area 3 is accessed
1 program wait state inserted when external space area 3 is accessed
2 program wait states inserted when external space area 3 is accessed
3 program wait states inserted when external space area 3 is accessed
(Initial value)
Bits 5 and 4—Area 2 Wait Control 1 and 0 (W21, W20): These bits select the number of
program wait states when area 2 in external space is accessed while the AST2 bit in ASTCR is set
to 1.
Bit 5
W21
0
1
Bit 4
W20
0
1
0
1
Description
Program wait not inserted when external space area 2 is accessed
1 program wait state inserted when external space area 2 is accessed
2 program wait states inserted when external space area 2 is accessed
3 program wait states inserted when external space area 2 is accessed
(Initial value)
Rev.7.00 Feb. 14, 2007 page 147 of 1108
REJ09B0089-0700