TDA7439 STMicroelectronics, TDA7439 Datasheet - Page 13

• Manufacturer Part Number: TDA7439
• Description: IC PROCESSOR AUDIO DGTL 30-SDIP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7439

• Applications: Automotive Systems
• Mounting Type: Through Hole
• Package / Case: 30-SDIP (0.400", 10.16mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8866-5; TDA7439

TDA7439
5
5.1
5.2
I
No address incrementing
The TDA7439 receives a start condition followed by the correct chip address, then a sub
address with the bit B = 0 (for no address increment), then the data bytes to be sent to the
sub address and finally a stop condition.
Figure 16. SDA addressing and data for B = 0
Address incrementing
The TDA7439 receives a start condition followed by the correct chip address, then a sub
address with the B = 1 for address incrementing; now it is in a loop condition with an
automatic increase of the sub address up to D[3:0] = 0x7. That is, the data for sub
addresses from D[3:0] = 1000 (binary) to 1111 are ignored.
In
directed to the sub address incremented by 1 (that is, 1 + D[3:0]) and so forth until a stop
condition is received to terminate the transmission.
Figure 17. SDA addressing and data for B = 1
Table 6.
Input selection
Input gain
Volume
Bass
Mid-range
Treble
Speaker
2
Figure 17
C bus transmission examples
S
S
MSB
MSB
1
1
0
0
CHIP ADDRESS
D96AU422
CHIP ADDRESS
0
D96AU421
below, DATA1 is directed to the sub address sent (that is, D[3:0]), DATA2 is
Power-on-reset conditions
0
0
0
1
Parameter
1
0
0
0
0
LSB
0
LSB
0
ACK
ACK
MSB
MSB
X
X
X
X
SUBADDRESS
X
SUBADDRESS
X
1
0
D3
D3
D2 D1 D0
D2 D1 D0
IN2
28 dB
MUTE
0 dB
2 dB
2 dB
MUTE
LSB
LSB
ACK
ACK
MSB
I
2
MSB
C bus transmission examples
DATA 1 to DATA n
POR value
DATA
DATA
DATA
LSB
LSB
ACK
ACK
P
P
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