M37906F8CFP データシートの表示（PDF） - Renesas Electronics

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M37906F8CFP

16-BIT CMOS MICROCOMPUTER

Renesas Electronics 

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MITSUBISHI MICROCOMPUTERS

M37906F8CFP, M37906F8CSP

16-BIT CMOS MICROCOMPUTER

FLASH MEMORY MODE

These microcomputers contain the flash memory; and single-power-

supply reprogramming is available to this. These microcomputers

have the following three modes, enabling reading/programming/era-

sure for the flash memory:

• Flash memory parallel I/O mode and Flash memory serial I/O

mode, where the flash memory is handled by using an external pro-

grammer.

• CPU reprogramming mode, where the flash memory is handled by

the central processing unit (CPU).

As shown in Figure 4, the flash memory is divided into several

blocks, and erasure per block is possible.

This internal flash memory has the boot ROM area storing the repro-

gramming control software for reprogramming in the CPU repro-

gramming mode and flash memory serial I/O mode, as well as the

user ROM area storing a certain control software for the normal op-

eration in the microcomputer mode.

Although our reprogramming control firmware for the flash memory

serial I/O mode has been stored into this boot ROM area on ship-

ment, the user-original reprogramming control software which is

more appropriate for the user’s system is reprogrammable into this

area, instead. Note that the reprogramming for the boot ROM area is

enabled only in the flash memory parallel I/O mode.

00100016

00FFFF16

00100016

007FFF16

00800016

00BFFF16

00C00016

00DFFF16

00E00016

00FFFF16

28 Kbytes

16 Kbytes

8 Kbytes

8 Kbytes

Fig. 4 M37906F8CFP, M37906F8CSP: block configuration of internal flash memory

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