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HN58C256A Datasheet, PDF (14/25 Pages) Hitachi Semiconductor – 256k EEPROM (32-kword x 8-bit) Ready/Busy and RES function (HN58C257A) | |||
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HN58C256A Series, HN58C257A Series
Toggle bit
This device provide another function to determine the internal programming cycle. If the EEPROM is set to
read mode during the internal programming cycle, I/O6 will charge from â1â to â0â (toggling) for each read.
When the internal programming cycle is finished, toggling of I/O6 will stop and the device can be accessible
for next read or program.
Toggle bit Waveform
Notes: 1. I/O6 beginning state is "1".
2. I/O6 ending state will vary.
3. See AC read characteristics.
4. Any address location can be used, but the address must be fixed.
Address
CE
tCE *3
Next mode
*4
WE
OE
I/O6
tOEH
Din
tOE*3
*1
Dout
Dout
tWC
*2
Dout
tOES
*2
Dout
tDW
14
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