Zilog Z80180 User Manual
Page 76
Z8018x
Family MPU User Manual
UM005003-0703
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
Value
Description
7
–
0
CB7
–
0
R/W
CBR specifies the base address (on 4KB boundaries) used
to generate a 20-bit physical address for Common Area 1
accesses.