7/13

¡ Semiconductor

MSM64422/64424

MEMORY MAPS

Program Memory

The program memory is a memory area for the program data, the interrupt area, the CZP area,

and the start address area.

The data length is 8 bits. For the MSM64422 addresses 0 to 2047 are assigned to the program

memory. For the MSM64424 address 0 to 4095 are assigned to the program memory.

Program area

Interrupt area

CZP area

Start address area

000H

12B

16B

2048B (4096B)

010H

020H

030H

7FFH

(0FFFH)

8 bits

Note

: "B" means data length of 8 bits.

Program Memory Address Space

The address 000H is the instruction execution start address after system reset. The CZP area

from address 010H to address 01FH is the start address for the CZP subroutine of 1-byte call

instruction and a maximum of eight commands can be held. The interrupt address from address

020H to 02FH is assigned the start address of interrupt subroutines.