Hitachi H8S/2646 Hardware Manual page 180

WCRL
Bit :
W31
Initial value :
R/W : 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 Bit 6
W31 W30
0 0
1
1 0
1
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 Bit 4
W21 W20
0 0
1
1 0
1
148
7 6 5
W30 W21
1 1 1
R/W R/W
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
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
4 3
W20 W11 W10
1 1
R/W R/W R/W
2 1 0
W01 W00
1 1 1
R/W R/W
(Initial value)
(Initial value)