Author Topic: NEC uPD6258 serial EEPROM datasheet  (Read 254 times)

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Offline Gyorgy AlbertTopic starter

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NEC uPD6258 serial EEPROM datasheet
« on: November 22, 2024, 01:35:14 pm »
Hi forum members,

I am looking desperately for the datasheet of an older 3 wire serial EEPROM made by NEC, uPD6258. It is a SOP8 3 wire device (similar to the Microwire interface) with 8 kbit capacity. Maybe I am lucky, and someone can help with the complete datasheet. It is in a pre-2K generation measurement instrument, and holds the calibration coefficients, which I would like to backup. All what I found are two lines in the 1995 NEC Semiconductor Selection Guide (including the uPD6257, the smaller 4kbit brother).

Thanks in advance,
Gyorgy (George)
 

Online coromonadalix

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Re: NEC uPD6258 serial EEPROM datasheet
« Reply #1 on: November 22, 2024, 03:47:18 pm »
some references here  but  programming wise ?

you have to check in many programmers their supported devices list ???

https://www.eevblog.com/forum/beginners/substitute-for-d6254-808e-eeprom/msg248913/#msg248913

attached a Renesas doc  with some interfacing
« Last Edit: November 22, 2024, 03:51:59 pm by coromonadalix »
 


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