h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 172

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 7 Bus Controller
WCRL
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.
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.
Rev. 5.00 Sep 22, 2005 page 146 of 1136
REJ09B0257-0500
Bit 7
W31
0
1
Bit 5
W21
0
1
Bit
Initial value
R/W
Bit 6
W30
0
1
0
1
Bit 4
W20
0
1
0
1
:
:
:
W31
R/W
7
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
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
W30
R/W
6
1
W21
R/W
5
1
W20
R/W
4
1
W11
R/W
3
1
W10
R/W
2
1
W01
R/W
1
1
(Initial value)
(Initial value)
W00
R/W
0
1