Mmu Register Description - ZiLOG Z8018 Series User Manual

Z8018x
Family MPU User Manual
60

MMU Register Description

MMU Common/Bank Area Register (CBAR: 3AH)
Bit
Bit/Field CA3
R/W R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position Bit/Field R/W
– –
7 4 CA7
– –
3 0 BA3
UM005004-0918
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.
7 6
CA2 CA1
R/W R/W
1 1
Value
4 R/W
0 R/W
5 4
CA0 BA3
R/W R/W
1 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.
3 2
BA2 BA1
R/W R/W
0 0
1 0
BA0
R/W
0 0