S-34C02A

Seiko Instruments Inc.

16

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.