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DS1851
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The DS1851 may operate in the following two modes:
1) Slave receiver mode: Serial data and clock are received through SDA and SCL respectively. After
each byte is received, an acknowledge bit is transmitted. START and STOP conditions are recognized
as the beginning and end of a serial transfer. Address recognition is performed by hardware after
reception of the slave (device) address and direction bit.
2) Slave transmitter mode: The first byte is received and handled as in the slave receiver mode.
However, in this mode the direction bit will indicate that the transfer direction is reversed. Serial data
is transmitted on SDA by the DS1851 while the serial clock is input on SCL. START and STOP
conditions are recognized as the beginning and end of a serial transfer.
Following the START condition, the DS1851 monitors the SDA bus checking the device type identifier
being transmitted. Upon receiving the 1010000 control code and the read/write bit, the slave device
outputs an acknowledge signal on the SDA line.
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