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4256BWP датащи(PDF) 16 Page - STMicroelectronics

номер детали 4256BWP
подробное описание детали  256-Kbit serial I²C bus EEPROM
PDF  41 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

4256BWP датащи(HTML) 16 Page - STMicroelectronics

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Instructions
M24256-BW M24256-BR M24256-BF M24256-DR M24256-DF
16/41
Doc ID 6757 Rev 28
5.1.2
Page Write
The Page Write mode allows up to 64 bytes to be written in a single Write cycle, provided
that they are all located in the same page in the memory: that is, the most significant
memory address bits, A15/A6, are the same. If more bytes are sent than will fit up to the end
of the page, a “roll-over” occurs, i.e. the bytes exceeding the page end are written on the
same page, from location 0.
The bus master sends from 1 to 64 bytes of data, each of which is acknowledged by the
device if Write Control (WC) is low. If Write Control (WC) is high, the contents of the
addressed memory location are not modified, and each data byte is followed by a NoAck, as
shown in Figure 8. After each transferred byte, the internal page address counter is
incremented.
The transfer is terminated by the bus master generating a Stop condition.
Figure 8.
Write mode sequences with WC = 1 (data write inhibited)
Byte Write
Dev sel
Byte addr
Byte addr
Data in
WC
Page Write
Dev sel
Byte addr
Byte addr
Data in 1
WC
Data in 2
AI01120d
Page Write (cont'd)
WC (cont'd)
Data in N
ACK
ACK
ACK
NO ACK
R/W
ACK
ACK
ACK
NO ACK
R/W
NO ACK
NO ACK



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