Renesas H8S/2158 User Manual page 165

Bit Bit Name Initial Value
4 AST 1
3 WMS21 0
2 WMS20 0
1 WC1 1
0 WC0 1
R/W Description
R/W Access State Control
Selects the number of states for access to the basic
expansion area. This bit also enables or disables wait-
state insertion.
0: 2-state access space. Wait state insertion disabled in
basic expansion area access
1: 3-state access space. Wait state insertion enabled in
basic expansion area access
When the CS256E bit in SYSCR and the CPCSE bit in
BCR2 are set to 1, this bit setting is ignored in 256-
kbyte expansion area access and CP/CF expansion
area access.
R/W Wait Mode Select 1, 0
R/W
Select the wait mode for access to the basic expansion
area when the AST bit is set to 1.
00: Program wait mode
01: Wait disabled mode
10: Pin wait mode
11: Pin auto-wait mode
When the CS256E bit in SYSCR and the CPCSE bit in
BCR2 are set to 1, this bit setting is ignored in 256-
kbyte expansion area access and CP/CF expansion
area access.
R/W Wait Count 1, 0
R/W
Select the number of program wait states to be inserted
when the basic expansion area is accessed while the
AST bit is set to 1.
00: Program wait state is not inserted
01: 1 program wait state is inserted
10: 2 program wait states are inserted
11: 3 program wait states are inserted
When the CS256E bit in SYSCR and the CPCSE bit in
BCR2 are set to 1, this bit setting is ignored in 256-
kbyte expansion area access and CP/CF expansion
area access.
Section 6 Bus Controller
Rev. 3.00 Jan 25, 2006 page 111 of 872
REJ09B0286-0300