ACE24C512C Datasheet, PDF (12/18 Pages) ACE Technology Co., LTD. – Two-wire serial EEPROM

ACE24C512C
Two-wire serial EEPROM
Figure12：Sequential Read
(D) Read Identification Page
The Identification Page (128 bytes) is an additional page which can be written and (later)
permanently locked in Read-only mode. The Identification Page can be read by Read Identification
Page instruction which uses the same protocol and format as the Read Command (from memory
array) with device type identifier defined as 1011b. The MSB address bits A15/A7 are don’t care, the
LSB address bits A6/A0 define the byte address inside the Identification Page. The number of bytes
to read in the ID page must not exceed the page boundary (e.g. when reading the Identification Page
from location 10d, the number of bytes should be less than or equal to 118, as the ID page boundary
is 128 bytes).
(E) Read Lock Status
The locked/unlocked status of the Identification page can be checked by transmitting a specific
truncated command [Identification Page Write instruction + one data byte] to the device. The device
returns an acknowledge bit if the Identification page is unlocked, otherwise a NoACK bit if the
Identification page is locked.
Figure13：Lock Status Read (When Identification page locked,
return NoACK after one data byte)
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