6

MLC0xxB Series Technical Summary

MEGAWIN

Memory Map

There are 256 bytes SRAM in MLC0xxB series. They are working RAM (0000H to 007FH) and stacks

(0180H to 01FFH). The address 0100H to 17FH are shared with address 0000H to 007FH. The

address 00C0H to 00FFH and 0200H to 027FH are special function registers area.

The bank select function, ranged from 4000H to 7FFFH, is used for extending memories if the ROM

size is more than 32K bytes in MLC0xxB series. The default bank number is 00H after power on or

reset.

There are 1024K ~ 48K bytes program/data ROM in MLC0xxB series. It is combined with 32K

program/data ROM and bank switching data ROM. The ROM address from 4000H to FFFFH can

store program, voice data, melody notes and other data. The address mapping of MLC0xxB series is

shown as below.

Table

Bank

5

(041)

Zero Page WR

0000H

007FH

MLC0xxB Series Memory Map

017FH

0100H

0080H~00BFH

00C0H~00FFH

0180H

01FFH

Stack Area

0200H

027FH

Special Function

Register

SFR

4000H

BFFFH

C000H

Interrupt Vector

Area

. . .

Table

Bank

0

(017)

Table

Bank

45

(241)

2

3

(031)

Program/Table

0300H

7FFFH

FFEEH ~ FFEFH

FFFEH ~ FFFFH

3FFFH

8000H

Table

Bank

1

(021)

-

Program/Table

. . .

Table

Bank

61

(331)

. . .

Share area

FFEDH