MB89120 データシートの表示（PDF） - Fujitsu

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MB89120

8-bit Proprietary Microcontroller

Fujitsu 

MB89120/120A Series

s PROGRAMMING TO THE EPROM ON THE MB89P131

The MB89P131 is a one-time PROM version of the MB89121.

1. Features

• 4-Kbyte PROM on chip

• Equivalency to the MBM27C256A in EPROM mode (when programmed with the EPROM programmer)

2. Memory Space

Memory space in EPROM mode is diagrammed below :

Address

0000H

F000H

Single chip

I/O

Not available

RAM

Not available

EPROM mode

(Corresponding addresses in the EPROM programmer)

0000H

7000H

Not available

PROM

4 KB

EPROM

32 KB

FFFFH

7FFFH

3. Programming to the EPROM

In EPROM mode the MB89P131 functions equivalent to the MBM27C256A. This allows the EPROM to be

programmed with a general-purpose EPROM programmer by using the dedicated socket adapter. Note, how-

ever, that the electronic signature mode cannot be used.

• Programming procedure

(1) Set the EPROM programmer to MBM27C256A.

(2) Load program data into the EPROM programmer at 7000H to 7FFFH (note that addresses F000H to

FFFFH while operating as a single chip correspond to 7000H to 7FFFH in EPROM mode) .

(3) Program with the EPROM programmer.

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