SOFTWARE SPECIFICATION

Interface Protocol

The interface protocol comprises:

A start condition (S)

A chip address byte, containing the TDA7315

address (the 8th bit of the byte must be 0). The

TDA7315 must always acknowledge at the end

of each transmitted byte.

A sequence of data (N-bytes + acknowledge)

A stop condition (P)

TDA7315 ADDRESS

MSB

first byte

LSB

MSB

LSB

MSB

LSB

S

1

0

0

0

0000

ACK

DATA

ACK

DATA

Data Transferred (N-bytes + Acknowledge)

ACK = Acknowledge

S = Start

P = Stop

MAX CLOCK SPEED 100kbits/s

SOFTWARE SPECIFICATION

Chip address = 80 Hex

1

MSB

00

00

000

LSB

DATA BYTES

MSB

LSB

FUNCTION

0

1

1

0

0

0

0

0

0

1

1

1

B2

0

1

0

1

1

B1

B1

B1

X

0

1

B0

B0

B0

X

C3

C3

A2

A2

A2

L

C2

C2

A1

A1

A1

X

C1

C1

A0

A0

A0

X

C0

C0

Volume control

Speaker ATT L

Speaker ATT R

Loudness

Bass control

Treble control

Ax = 1.25dB steps; Bx = 10dB steps; Cx = 2dB steps; X = don‘t care.

Figure 15: Typical Tone Response (with the ext.

components indicated in the test

circuit)

TDA7315

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