DS1077

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SLAVE ADDRESS

A control byte is the first byte received following the START condition from the master device. The

control byte consists of a 4-bit control code; for the DS1077, this is set as 1011 binary for read and write

operations. The next three bits of the control byte are the device select bits (A2, A1, A0) and can be

written to the EEPROM. They are used by the master device to select which of eight devices are to be

accessed. The select bits are in effect the three least significant bits of the slave address. The last bit of the

and when set to a zero, a write operation is selected. Following the START condition, the DS1077

monitors the SDA bus, checking the device type identifier being transmitted. Upon receiving the 1011

code (changeable with one mask) and appropriate device select bits, the slave device outputs an

acknowledge signal on the SDA line.