TDA7438D013TR STMicroelectronics, TDA7438D013TR Datasheet - Page 9

• Manufacturer Part Number: TDA7438D013TR
• Description: IC PROCESSOR AUDIO DGTL 28-SOIC
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7438D013TR

• Applications: Automotive Systems
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 15. Acknowledge on the I
5
Interface Protocol
The interface protocol comprises:
Figure 16.
ACK = Acknowledge
S = Start
P = Stop
A = Address
B = Auto Increment
5.1 EXAMPLES
5.1.1 No Incremental Bus
The TDA7438 receives a start condition, the correct chip address, a subaddress with the B = 0 (no incre-
mental bus), N-data (all these data concern the subaddress selected), a stop condition.
Figure 17.
5.1.2 Incremental Bus
The TDA7438 receive a start conditions, the correct chip address, a subaddress with the B = 1 (incremen-
tal bus): now it is in a loop condition with an autoincrease of the subaddress whereas SUBADDRESS from
"XXX1000" to "XXX1111" of DATA are ignored.The DATA 1 concern the subaddress sent, and the DATA
2 concern the subaddress sent plus one in the loop etc, and at the end it receivers the stop condition
A start condition (S)
A chip address byte, containing the TDA7438 address
A subaddress bytes
A sequence of data (N byte + acknowledge)
SOFTWARE SPECIFICATION
S
S
MSB
MSB
1
1
0
0
CHIP ADDRESS
D96AU420
CHIP ADDRESS
D96AU421
SDA
SCL
0
0
0
0
START
1
1
0
0
0
0
LSB
LSB
0
0
MSB
1
ACK
ACK
2
CBUS
MSB
MSB
X
X
X
X
2
SUBADDRESS
SUBADDRESS
X
X
D99AU1033
B
0
D3
3
DATA
D2 D1 D0
LSB
LSB
7
ACK
ACK
MSB
MSB
DATA 1 to DATA n
8
ACKNOWLEDGMENT
FROM RECEIVER
DATA
DATA
DATA
9
LSB
LSB
ACK
ACK
TDA7438
P
P
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