Z80180 Datasheet, PDF (76/326 Pages) Zilog, Inc. – Z8018x Family MPU

Z 8018x Fam ily
M PU Us e r M anual
61
MMU Common Base Register (CBR)
CBR specifies the base address (on 4K boundaries) used to generate a 20-
bit physical address for Common Area 1 accesses. All bits of CBR are
reset to 0 during RESET.
MMU Common Base Register (CBR: 38H)
Bit
7
6
5
4
3
2
1
0
Bit/Field CB7 CB6 CB5 CB4 CB3 CB2
CB1
CB0
R/W
R/W R/W R/W R/W R/W R/W
R/W
R/W
Reset
0
0
0
0
0
0
0
0
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position Bit/Field R/W
7–0
CB7–0 R/W
Value Description
CBR specifies the base address (on 4KB boundaries) used
to generate a 20-bit physical address for Common Area 1
accesses.
UM005001-ZMP0400