BL55070
zip: 200233
Shanghai Belling Corp., Ltd
Tel: 86-021-64850700 Fax: 86-021-64855865
Fig 3
I
2
C-bus protocol
I
2
C-bus slave addresses (0111000) are reserved for the BL55070
The I2C-bus protocol is shown in Fig.4. The sequence is initiated with a START
condition (S) from the I2C-bus master which is followed by the BL55070 slave addresses
available. After acknowledgement, one or more command bytes (m) follow which define the
status of the addressed BL55070. The last command byte is tagged with a cleared most
significant bit, the continuation bit C. The command bytes are also acknowledged by the
addressed BL55070 on the bus. After the last command byte, a series of display data bytes(n)
may follow. These display bytes are stored in the display RAM at the address specified by the
data pointer. Data pointer are automatically updated and the data is directed to the intended
BL55070 device. After the last display byte, the I2C-bus master issues a STOP condition (P).
3.
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BELLING [ SHANGHAI BELLING CO., LTD. ]
