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 MB89P135A

The MB89P135A is an OTPROM version of the MB89123A/125A.

1. Features

• 16-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

0080H

0280H

8000H

BFF0H

BFF6H

C000H

Single chip

I/O

RAM

Not available

Not available

Not available

Not available

EPROM mode

(Corresponding addresses on the EPROM programmer)

0000H

3FF0H

3FF6H

4000H

Vacancy

(Read value FFH)

Option area

Vacancy

(Read value FFH)

PROM

16 KB

EPROM

16 KB

FFFFH

7FFFH

3. Programming to the EPROM

In EPROM mode, the MB89P135A functions equivalent to the MBM27C256A. This allows the PROM to be

programmed with a general-purpose EPROM programmer (the electronic signature mode cannot be used) by

using the dedicated socket adapter.

• Programming procedure

(1) Set the EPROM programmer to the MBM27C256A.

(2) Load program data into the EPROM programmer at 4000H to 7FFFH (note that addresses C000H to

FFFFH while operating as a single chip correspond to 4000H to 7FFFH in EPROM mode) .

(3) Load option data into the EPROM programmer at 3FF0H to 3FF6H.

(4) Program with the EPROM programmer.

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