MB89850R データシートの表示（PDF） - Fujitsu

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MB89850R

8-bit Proprietary Microcontroller

Fujitsu 

MB89850R Series

s PROGRAMMING TO THE EPROM ON THE MB89P857/W857

The MB89P857/W857 are an OTPROM version of the MB89850R series.

1. Features

• 32-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

0480H

8000H

Single chip

I/O

RAM

Not available

EPROM mode

( Corresponding addresses on the EPROM programmer)

0000H

FFFFH

PROM

32 KB

7FFFH

EPROM

32 KB

3. Programming to the EPROM

In EPROM mode, the MB89P857/W857 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 0000H to 7FFFH (note that addresses 8000H to FFFFH

while operating as a single chip assign to addresses 0000H to 7FFFH in EPROM mode.)

(3) Program to 0000H to 7FFFH with the EPROM programmer.

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