AT28C64, 28C64 Datasheet, 28C64 64K ns Parallel PLCC EEPROM Datasheet, buy 28C Find Datasheet EEPROM related suppliers, manufacturers, products and specifications on GlobalSpec – a trusted source of Datasheet EEPROM. Compatible with the Serial Peripheral Interface. (SPI) bus. • Memory array. – 64 Kb (8 Kbytes) of EEPROM. – Page size: 32 bytes. • Write.
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If the device rejects any write cycles that are excessively long, that may help guard against erroneous write operations in cases where a system operation gets disrupted e.
If that were the intended purpose, however, I would expect a specification that would indicate that write pulses within a certain range are guaranteed 8264 be accepted, write pulses that are outside a larger range would be guaranteed to be ignored, and those between the two ranges might arbitrarily be accepted or ignored.
In either case, ns seems like a curiously short maximum.
The address needs to be held for an entire write cycle, so any dynamic latches would need to be able to deal with that. If the cycle limit is intended to guard against stray write events, engineering it to be usable with systems that run at slow clock speeds should have been trivial and would have improved usability.
EEPROM datasheet & applicatoin notes – Datasheet Archive
Home Questions Tags Users Unanswered. I am still just learning about electronics on my own, so please bear with me. There are two reasons I can think of for having a limit to the write pulse length: For example here is the datasheet for the 26C64 write timing: Notice there is no upper bound for any of the chip select or write timing.
Thanks for the answer. An example feprom I have worked with is this one cva. This meant they could not work down to DC. Would be good to clarify by changing the DC bit. The 1us maximum write pulse time seems really weird, since many processors would need extra circuitry in order to meet that spec. An running at 3.
So if the write pulse is too long, you clear the chip. Sign up or log in Sign up using Google. Sign up using Facebook.