UPD754144 데이터 시트보기 (PDF) - NEC => Renesas Technology
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UPD754144 Datasheet PDF : 88 Pages
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µPD754144, 754244
6. EEPROM
The µPD754244 incorporates 16 words × 8 bit EEPROM (Electrically Erasable PROM) as well as static RAM
(128 words × 4 bit) as a data memory.
The EEPROM incorporated into the µPD754244 has the following features.
(1) Written data is retained if power is turned off.
(2) 8-bit data manipulation (auto-erase/auto-write) is available by memory manipulation instruction as well as
for static RAM. However available instructions are restricted.
(3) It can reduce loads of software because the auto-erase and/or auto-write operation is performed by
hardware.
(4) Write operation control using the interrupt request
The interrupt request is generated under following conditions.
• Terminates write operation
• Write status flag
It is possible to check whether enables or disables write operation by bit manipulation instructions.
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