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May 12, 2010
 
IDT Confidential
Read Mode Sequences
Random Address Read
A dummy Write is first performed to load the address into this address counter (refer to the Read Mode Sequence figure) but without sending a
Stop condition. Then, the bus master sends another Start condition, and repeats the Device Select Code, with the R/W# bit set to 1. The device
acknowledges this, and outputs the contents of the addressed byte. The bus master must not acknowledge the byte, and terminates the transfer with
a Stop condition.
Current Address Read
For the Current Address Read operation, following a Start condition, the bus master only sends a Device Select Code with the R/W# bit set to 1.
The device acknowledges this, and outputs the byte addressed by the internal address counter. The counter is then incremented. The bus master
terminates the transfer with a Stop condition, as shown in the Read Mode Sequence figure, without acknowledging the byte.
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