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3-wire protocol

For the 3-wire serial bus the first byte refers to the register address which is programmed. The second byte refers to the data to be sent to the chosen

register (see Table 1). The acquisition is achieved via SEN.

Using the 3-wire interface, an indefinite number of ICs can operate on the same system. Pin SEN is used to validate the circuits.

MGG365

ts3W = 100 ns

th3W = 100 ns

tr3W = 600 ns

100 ns

11

99

XXXX

A3

A2

A1

A0

X

D7

D6

D5

D4

D3

D2

D1

D0

X

SEN

SCL

SDA

Fig.10 3-wire serial bus protocol.