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MB89940 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 and up to a total of 16 banks can be used on the MB89943 (RAM 512

× 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. Up to a total of 32 banks can

be used on other than the MB89943.

Register Bank Configuration

× (RP)

Memory area

16 banks

R 0

R 1

R 2

R 3

R 4

R 5

R 6

R 7