TDA7309

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4

SOFTWARE SPECIFICATION

4.1 Interface Protocol

The interface protocol comprises:

The TDA7309 must always acknowledge at the end of each transmitted byte.

Figure 19.

ACK = Acknowledge

S = Start

P = Stop

MAX CLOCK SPEED 400kbits/s

Table 7. Chip address

Table 8. Function Codes

Table 9. Channel Abilitation Codec

MSB

LSB

001

1001

0

pin address open

001

1000

0

pin address close to ground

MSB

F6F5

F4

F3F2

F1

LSB

VOLUME

0

XXX

XXX

X

MUTE/LOUD

1

0

0

X

X

X

X

X

INPUTS

1

0

1

X

X

X

X

X

CHANNEL

1

1

0

X

X

X

X

X

MSB

F6

F5

F4

F3

F2

F1

LSB

FUNCTION

1

1

0

channel

XX

X0

0

RIGHT

XX

X0

1

LEFT

XX

X1

0

BOTH

XX

X1

1

BOTH