TDA7346 Datasheet, PDF (7/14 Pages) STMicroelectronics – DIGITAL CONTROLLED SURROUND SOUND MATRIX

SOFTWARE SPECIFICATION
Interface Protocol
The interface protocol comprises:
A start condition (s)
A chip address byte, containing the TDA7346
TDA7346
address (the 8th bit of the byte must be 0). The
TDA7346 must always acknowledge at the end
of each transmitted byte.
A sequence of data (N bytes + achnowledge).
A stop condition (P)
TDA7346 ADDRESS
MSB ^{first byte}
LSB MSB
S 1 1 0 1 1 1 A 0 ACK
DATA
LSB MSB
ACK
DATA
LSB
ACK P
ACK = Acknowledge
S = Start
P = Stop
MAX CLOCK SPEED 100kbits/s
SOFTWARE SPECIFICATION
Chip address
1
1
0
1
1
1
MSB
Data Transferred (N-bytes + Acknowledge)
A
0
A
0
1
LSB
CHIP ADDRESS
DC (HEX)
DE (HEX)
A = Logic level on pin ADDR
A = 1 if ADDR pin = open
A = 0 if ADDR pin = connected to ground
Software Specification
MSB
LSB
SUBADDRESS
0
0
A5
A4
A3
A2
A1
A0 INPUT ATTENUATION R
0
1
A5
A4
A3
A2
A1
A0 INPUT ATTENUATION L
1
M1
M0
SURROUND MODES
1
0
0
SIMULATED MODE
1
0
1
MUSIC MODE
1
1
0
MOVIE MODE
1
1
1
1
1
1
1
1
OFF MODE
1
M1
M0
1
B3
B2
B1
B0 EFFECT CONTROL
1
M1
M0
0
0
0
C1
C0 PHASE SHIFTER 4 CONTROL
1
M1
M0
0
0
1
C1
C0 PHASE SHIFTER 3 CONTROL
1
M1
M0
0
1
0
D1
D0 PHASE SHIFTER 2 CONTROL
1
M1
M0
0
1
1
E1
E0 PHASE SHIFTER 1 CONTROL
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