HN58V65AI/HN58V66AI/HN58V65A-SR/HN58V66A-SR Series

Rev.3.00, Feb.02.2004, page 17 of 26

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.

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.

WE

t

OES

OE

CE

Dout

I/O6

Dout

Dout

Dout

Next mode

t

OE

t

CE

t

DW

t

WC

t

OEH

*1

*2

*2

Address

*3

*3

*4

Din