S-34C02A Datasheet, PDF (16/34 Pages) Seiko Instruments Inc – 2-WIRE CMOS SERIAL E2PROM FOR DIMM SERIAL PRESENCE DETECT

2-WIRE CMOS SERIAL E²PROM FOR DIMM SERIAL PRESENCE DETECT
S-34C02A
Rev.1.2_00
6. 5 Acknowledge Polling
Acknowledge polling is used to find when the Write operation has completed. After receiving a stop condition the
Write operation has once started, all operations are inhibited to be performed so that the S-34C02A cannot respond
to the signals transmitted from the master device. The master device sends a start condition, the device address
and Read/Write instruction code to the S-34C02A (slave address), and detects the response from the slave
address. It is possible to find when the Write operation has completed. Thus if the slave device does not send an
acknowledgment signal back, the Write operation is in progress. If it sends an acknowledgment signal back, the
Write operation has completed. Fix the WP pin until an acknowledgment is confirmed. It is recommended to use the
Read instruction “1” for the Read/Write instruction code transmitted by the master device during acknowledgment
polling.
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Seiko Instruments Inc.