MB89160/160A Series
The following general-purpose registers are provided:
General-purpose registers: An 8-bit register for storing data
The general-purpose registers are 8 bits and located in the register banks of the memory. One bank contains
eight registers. Up to a total of 16 banks can be used on the MB89163 (RAM 256 × 8 bits), and a total of 32
banks can be used on the MB89165 (RAM 256 × 8 bits). The bank currently in use is indicated by the register
bank pointer (RP).
Note: The number of register banks that can be used varies with the RAM size.
Register Bank Configuraiton
This address = 0100H + 8 × (RP)
R 0
R 1
R 2
R 3
R 4
R 5
R 6
R 7
16 banks (MB89163)
32 banks (MB89165)
Memory area
25
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