HN58X24128TI HITACHI [Hitachi Semiconductor], HN58X24128TI Datasheet - Page 14

• Manufacturer Part Number: HN58X24128TI
• Description: Two-wire serial interface, 128k EEPROM (16-kword x 8-bit), 256k EEPROM (32-kword x 8-bit)
• Manufacturer: HITACHI [Hitachi Semiconductor]

HN58X24128I/HN58X24256I
Acknowledge Polling:
Acknowledge polling feature is used to show if the EEPROM is in a internally-timed write cycle or not.
This features 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 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
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Proceed write operation
Proceed random address
addressing the memory
device address word
to initiate write cycle
memory address
Next operation is
write command
read operation
stop condition
start condition
with R/W = 0
returned
Send
Send
Send
Send
ACK
Send
Yes
Yes
No
No
start condition
stop condition
Send
Send
stop condition
Send