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R1EX24064AxxS0A
Acknowledge Polling:
Acknowledge polling feature is used to show if the EEPROM is in a internally-timed write cycle or not.
This feature is initiated by the stop condition after inputting write data. This requires the 8-bit device
address word following the start condition during a internally-timed write cycle. Acknowledge polling
will operate when the R/W code = “0”. Acknowledgment “1” (no acknowledgment) shows the EEPROM
is in a internally-timed write cycle and acknowledgment “0” shows that the internally-timed write cycle has
completed. See Write Cycle Polling using ACK.
Write Cycle Polling Using ACK
Send
write command
Send
stop condition
to initiate write cycle
Send
start condition
Send
device address word
with R/W = 0
ACK
returned
Yes
Next operation is
addressing the memory
Yes
No
No
Send
memory address
Send
start condition
Send
stop condition
Proceed write operation
Proceed random address
read operation
Send
stop condition
REJ03C0332-0200 Rev.2.00 Oct. 26, 2009
Page 16 of 22
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