z80189 ZiLOG Semiconductor, z80189 Datasheet - Page 76

• Manufacturer Part Number: z80189
• Description: Z80180, Z8s180, Z8l180 Mpu Operation
• Manufacturer: ZiLOG Semiconductor

MMU Common Base Register (CBR: 38H)
Bit
Bit/Field
R/W
Reset
Note: R = Read W = Write X = Indeterminate ? = Not Applicable
Bit
Position Bit/Field R/W
7
–
0
CB7
R/W
CB7
–
7
0
0
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.
R/W
CB6
R/W
6
0
Value
CB5
R/W
5
0
Description
CBR specifies the base address (on 4KB boundaries) used
to generate a 20-bit physical address for Common Area 1
accesses.
R/W
CB4
4
0
CB3
R/W
3
0
CB2
R/W
Family MPU User Manual
2
0
CB1
R/W
1
0
UM005003-0703
Z8018x
CB0
R/W
0
0
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