HN58X2402 データシートの表示（PDF） - Hitachi -> Renesas Electronics

部品番号

コンポーネント説明

メーカー

HN58X2402

Two-wire serial interface (2k EEPROM 256-word x 8-bit) 4k EEPROM (512-word x 8-bit)

Hitachi -> Renesas Electronics 

HN58X2402/58X2404/58X2408/58X2416/58X2432/58X2464

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

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

Send

memory address

No

No

Send

start condition

Send

stop condition

Proceed write operation

Proceed random address

read operation

Send

stop condition

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