Z8S180 Zilog., Z8S180 Datasheet - Page 75
Z8S180
Manufacturer Part Number
Z8S180
Description
ENHANCED Z180 MICROPROCESSOR
Manufacturer
Zilog.
Datasheet
1.Z8S180.pdf
(326 pages)
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MMU Common/Bank Area Register (CBAR: 3AH)
UM005001-ZMP0400
Bit
Bit/Field
R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position Bit/Field R/W
7
3
–
–
Z 8018x Fam il y
M PU Us e r M anual
4
0
MMU Register Description
CA7
BA3
CA3
R/W
–
–
4
0
7
1
MMU Common/Bank Area Register (CBAR)
CBAR specifies boundaries within the Z8X180 64KB logical address
space for up to three areas; Common Area 0, Bank Area and Common
Area 1.
R/W
R/W
CA2
R/W
6
1
Value
CA1
R/W
5
1
Description
CA specifies the start (low) address (on 4KB boundaries)
for the Common Area 1. This also determines the last
address of the Bank Area.
BA specifies the start (low) address (on 4KB boundaries)
for the Bank Area. This also determines the last address
of the Common Area 0.
CA0
R/W
4
1
BA3
R/W
3
0
BA2
R/W
2
0
BA1
R/W
1
0
BA0
R/W
0
0
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