MB89F202 参数 Datasheet PDF下载

MB89202 Series

7. Flash Content Protection

Flash content can be read using parallel / serial programmer if the flash content protection mechanism is not

activated.

One predefined area of the flash (FFFC

H

) is assigned to be used for preventing the read access of flash content.

If the protection code "01

H

" is written in this address (FFFC

H

), the flash content cannot be read by any parallel/

serial programmer.

Note : The program written into the flash cannot be verified once the flash protection code is written ("01

H

" in

FFFC

H

). It is advised to write the flash protection code at last.

■

PROGRAMMING TO THE EPROM WITH EVALUATION PRODUCT DEVICE

1. EPROM for Use

MBM27C256A (DIP-28)

2. Memory Space.

Normal operating mode

Address

0000

H

I/O

0080

H

RAM 512 bytes

0280

H

Not available

Corresponding adresses on the

ROM programmer

Address

8000

H

0000

H

PROM 32 Kbytes

EPROM 32 Kbytes

FFFF

H

7FFF

H

3. Programming to the EPROM

(1) Set the EPROM programmer to the MBM27C256A.

(2) Load program data into the EPROM programmer at 0000

H

to 7FFF

H

.

(3) Program to 0000

H

to 7FFF

H

with the EPROM programmer.

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