m24c64-df STMicroelectronics, m24c64-df Datasheet - Page 17

• Manufacturer Part Number: m24c64-df
• Description: 64 Kbit Serial I?c Bus Eeprom
• Manufacturer: STMicroelectronics

M24C64-DF, M24C64-W, M24C64-R, M24C64-F
4.9
Figure 10. Write mode sequences with WC = 0 (data write enabled)
Write Identification Page (M24C64-D only)
The Identification Page (32 bytes) is an additional page which can be written and (later)
permanently locked in Read-only mode. The Identification Page is written by issuing an
Write Identification Page instruction. This instruction uses the same protocol and format as
Page Write (into memory array), except for the following differences:
●
●
LSB address bits A4/A0 define the byte address inside the Identification Page.
If the Identification Page is locked, the data bytes transferred during the Write Identification
Page instruction are not acknowledged (NoAck).
WC
Byte Write
WC
Page Write
WC (cont'd)
Page Write
(cont'd)
Device type identifier = 1011b
MSB address bits A15/A5 are don't care except for address bit A10 which must be ‘0’.
Dev Select
Dev Select
ACK
Doc ID 16891 Rev 23
Data in N
R/W
R/W
ACK
ACK
Byte address
Byte address
ACK
ACK
ACK
Byte address
Byte address
ACK
ACK
Data in 1
Data in
Device operation
ACK
ACK
AI01106d
Data in 2
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