Philips MIIC-201D/U User Manual

Page 25

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19

Use the I

2

C Message Editor to:

1. Set I

2

C Address.

The I

2

C Address is the I

2

C slave address of the slave device being addressed

on the bus. All slave addresses are displayed as even numbers (00...FE),
representing the 7 most significant bits of the 8-bit slave address transmitted
on the bus (aaaa aaa0).

The I

2

C adapter automatically supplies the 8

th

, least significant, Read/Write bit

when it sends the slave address across the bus. For master write operations,
the Read/Write bit is always transmitted as a logical 0 (aaaa aaa0). For master
read operations, the Read/Write bit is always transmitted as a logical 1 (aaaa
aaa1).

Use the I

2

C Address control to set the slave address of the slave device you

want to address on the bus.

2. Set Message Read/Write Direction.

As a bus master device, the I

2

C adapter can write data to, or read data from,

any device on the bus. Use the Msg Direction control to specify if the current
message is a master write, or master read, operation. Upon making your
selection, additional Write or Read parameters appear.

3. Specify Repeated Start Messages.

I

2

C Bus communications support an operation called Repeated Start. In this

operation, a message is sent across the bus beginning with a Start Condition,
but without a Stop Condition at the end of the message. The next message sent

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