HN58C1001 Datasheet, PDF (14/24 Pages) Hitachi Semiconductor – 1M EEPROM (128-kword x 8-bit) Ready/Busy and RES function

HN58C1001 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 “1” to “0” (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.
Notes: 1. I/O6 beginning state is “1”.
2. I/O6 ending state will vary.
3. See AC read characteristics.
4. Any location can be used, but the address must be fixed.
Toggle bit Waveform
Address
CE
t_CE ^*3
Next mode
*4
WE
t_OE^*3
OE
t_OEH
*1
I/O6
Din
Dout
Dout
t_WC
*2
Dout
t_OES
*2
Dout
t_DW
Rev.8.00, Nov. 27.2003, page 14 of 21