AS3543 datasheet(28/92 Pages) AMSCO

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AS3543 3v2

Data Sheet - D e t a i l e d D e s c r i p t i o n - A u d i o F u n c t i o n s

8.7

2-Wire-Serial Control Interface

8.7.1

General

There is an I2C slave block implemented to have access to 64 byte of setting information.

The I2C address is: Adr_Group8 - audio processors

8Ch_write

8Dh_read

8.7.2

Protocol

Figure 13. Byte Write

Figure 14. Page Write

Byte Write and Page Write formats are used to write data to the slave.

The transmission begins with the START condition, which is generated by the master when the bus is in IDLE state

(the bus is free). The device-write address is followed by the word address. After the word address any number of data

bytes can be sent to the slave. The word address is incremented internally, in order to write subsequent data bytes on

subsequent address locations.

Table 18. 2-Wire Serial Symbol Definition

Symbol

Definition

Note

Start condition after stop

1 bit

Repeated start

1 bit

Device address for write

1000 1100b (8Ch)

Device address for read

1000 1101b 8Dh)

Word address

8 bit

Acknowledge

1 bit

No Acknowledge

1 bit

reg_data

8 bit

data (n)

8 bit

Stop condition

1 bit

WA++

Increment word address internally

during acknowledge

AS3543 (=slave) receives data

AS3543 (=slave) transmits data

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