TAS3208IPZPR datasheet(33/79 Pages) TI1

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TAS3208

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SLES201E

– JANUARY 2007 – REVISED MARCH 2011

I2C Slave Mode Operation

The I2C slave mode is the mode that is used to change configuration parameters during operation and perform

program and coefficient downloads from a master device. The latter can be used to replace the I2C master mode

EEPROM download.

The TAS3208 uses the slave mode to load the memory contents for the:

•

Microprogram memory

•

Micro extended memory

•

DSP program memory

•

DSP coefficient memory

•

DSP data memory

•

Update coefficient and other control values

•

Read status flags

The TAS3208 support both random and sequential I2C transactions. The TAS3208 I2C slave address is

011010X, where the first six bits are the TAS3208 device address and the final one bit is set by the TAS3208

internal microprocessor at power up. The internal microprocessor derives the last bit from an external pin

(CS),which is pulled up or down to create two unique addresses for control of multiple TAS3208 part

applications. The pulldown resistance of CS creates a default 00 address when no connection is made to the pin.

The TAS3208 I2C block does respond to the broadcast address (00h).

NOTE

When acting as an I2C slave, data-rate transfer is determined by the master device on the

bus. However, the setting of I2C parameter N at subaddress 0x01 does play a role in

setting the maximum possible data transfer rate. In the I2C slave mode, bit rates other

than (and including) the I2C-specific 100-Kbps and 400-Kbps bit rates can be obtained, but

N must always be set so that the oversample clock into the I2C master and slave

controllers is at least a factor of 20 higher in frequency than SCL.

N = 0 is a special case. When N = 0, a mode is enabled that detects I2C frames and enables the TAS3208 I2C

interface to reset and continue operation after receiving an invalid I2C frame.

Table 9.

I2C Slave Addresses

SLAVE ADDRESS

0x68/69

0x6A/6B

Table 10.

I2C Master Addresses

SLAVE ADDRESS

0xA0/A1

0xA2/A3

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