MB90F523B 查看數據表（PDF） - Fujitsu

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MB90F523B

16-bit Proprietary Microcontroller

Fujitsu 

MB90520A/520B Series

s MEMORY MAP

Single chip mode with mirror function

FFFFFFH

Address #1

ROM area

FE0000H

Part No.

MB90522A/B

MB90523A/B

MB90F523B

MB90V520A

010000H

Address #2

ROM area

(image of

FF bank)

004000H

002000H

Address #3

000100H

0000C0H

000000H

RAM Registers

Peripherals

Address #1*

FF0000H

FE0000H

FE0000H



Address #2*

004000H

004000H

004000H



Address #3*

001100H

001100H

001100H

001900H

: Internal memory access

: Access prohibited

* : The values of addresses #1, #2, and #3 vary by product.

Note : The upper part of 00 bank contains a mirror of the ROM data in FF bank. This is called the mirror ROM

function and enables use of the C compiler’s small memory model. As the lower 16 bits of the FF bank and

00 bank addresses are the same, tables located in ROM can be referenced without needing to declare far

pointers.

For example, accessing 00C000H actually accesses the contents of ROM at FFC000H. Note that, as the FF

bank ROM area exceeds 48 KBytes, the entire ROM image cannot be mirrored in 00 bank. Accordingly, as

ROM data from FF4000H to FFFFFFH is mirrored in 004000H to 00FFFFH, always locate ROM data tables in

the range FF4000H to FFFFFFH.

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