MB91210 Series
[bit1, bit0] WTH1, WTH0 (Bus width specification bits)
These bits set the bus width specification in external bus mode.
In external bus mode, this value is set in the DBW0 bit of ACR0 (CS0 area).
WTH1
WTH0
Function
Remarks
0
0
8-bit bus width
Setup prohibited
0
1
16-bit bus width
Setup prohibited
1
0
—
Setup prohibited
1
1
Single-chip mode
Single-chip mode
22