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ST24W01B6TR View Datasheet(PDF) - STMicroelectronics

Part Name
Description
Manufacturer
ST24W01B6TR
ST-Microelectronics
STMicroelectronics ST-Microelectronics
ST24W01B6TR Datasheet PDF : 16 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
ST24/25C01, ST24C01R, ST24/25W01
Figure 6. I2C Bus Protocol
SCL
SDA
START
CONDITION
SDA
SDA
INPUT CHANGE
STOP
CONDITION
SCL
SDA
1
2
3
MSB
START
CONDITION
SCL
SDA
1
2
3
MSB
7
8
9
ACK
7
8
9
ACK
STOP
CONDITION
AI00792
Write Operations
The Multibyte Write mode (only available on the
ST24/25C01 and the ST24C01R versions) is se-
lected when the MODE pin is at VIH and the Page
Write mode when MODE pin is at VIL. The MODE
pin may be driven dynamically with CMOS input
levels.
Following a START condition the master sends a
device select code with the RW bit reset to ’0’. The
memory acknowledges this and waits for a byte
address. The byte address of 7 bits (the Most
Significant Bit is ignored) provides access to any of
the 128 bytes of the memory. After receipt of the
byte address the device again responds with an
acknowledge.
8/16
For the ST24/25W01 versions, any write command
with WC = 1 (during a period of time from the
START condition untill the end of the Byte Address)
will not modify data and will NOT be acknowledged
on data bytes, as in Figure 9.
Byte Write. In the Byte Write mode the master
sends one data byte, which is acknowledged by the
memory. The master then terminates the transfer
by generating a STOP condition. The Write mode
is independant of the state of the MODE pin which
could be left floating if only this mode was to be
used. However it is not a recommended operating
mode, as this pin has to be connected to either VIH
or VIL, to minimize the stand-by current.
 

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