Datasheet

Section 7 Bus Controller
Rev. 6.00 Mar. 18, 2010 Page 171 of 982
REJ09B0054-0600
Bit Bit Name Initial Value R/W Description
5
4
W21
W20
1
1
R/W
R/W
Area 2 Wait Control 1 and 0
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.
00: Program wait not inserted when external space area
2 is accessed
01: 1 program wait state inserted when external space
area 2 is accessed
10: 2 program wait states inserted when external space
area 2 is accessed
11: 3 program wait states inserted when external space
area 2 is accessed
3
2
W11
W10
1
1
R/W
R/W
Area 1 Wait Control 1 and 0
These bits select the number of program wait states
when area 1 in external space is accessed while the
AST1 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
1 is accessed
01: 1 program wait state inserted when external space
area 1 is accessed
10: 2 program wait states inserted when external space
area 1 is accessed
11: 3 program wait states inserted when external space
area 1 is accessed
1
0
W01
W00
1
1
R/W
R/W
Area 0 Wait Control 1 and 0
These bits select the number of program wait states
when area 0 in external space is accessed while the
AST0 bit in ASTCR is set to 1.
00: Program wait not inserted when external space area
0 is accessed
01: 1 program wait state inserted when external space
area 0 is accessed
10: 2 program wait states inserted when external space
area 0 is accessed
11: 3 program wait states inserted when external space
area 0 is accessed