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MLC121B Datasheet(PDF) 6 Page - Megawin Technology Co., Ltd

Part # MLC121B
Description  Single chip 8-bit CPU
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Manufacturer  MEGAWIN [Megawin Technology Co., Ltd]
Direct Link  http://www.megawin.com.tw/megawin_EN/Index.asp
Logo MEGAWIN - Megawin Technology Co., Ltd

MLC121B Datasheet(HTML) 6 Page - Megawin Technology Co., Ltd

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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


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