TDA7449L STMicroelectronics, TDA7449L Datasheet - Page 8

• Manufacturer Part Number: TDA7449L
• Description: IC PROCESSOR AUDIO DGTL 20-PDIP
• Manufacturer: STMicroelectronics
• Type: Audio Processorr

Specifications of TDA7449L

• Applications: TV
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7449L
6.2 Incremental Bus
The TDA7449L 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.
Figure 13.
Table 6. POWER ON RESET CONDITION
7
Address = 88 HEX (ADDR:OPEN).
Table 7. FUNCTION SELECTION: First byte (subaddress)
B = 1: INCREMENTAL BUS ACTIVE
B = 0: NO INCREMENTAL BUS
X = DON’T CARE
In Incremental Bus Mode, the three "not used" functions must be addressed in any case. For example to
refresh "Volume = 0dB" and Speaker_R = -40dB", the following bytes must be sent:
8/14
S
MSB
MSB
DATA BYTES
D7
1
X
X
X
X
X
X
X
X
0
CHIP ADDRESS
D96AU422
0
0
D6
X
X
X
X
X
X
X
X
1
0
INPUT SELECTION
D5
0
INPUT GAIN
X
X
X
X
X
X
X
X
SPEAKER
VOLUME
LSB
0
ACK
D4
B
B
B
B
B
B
B
B
MSB
X
X
D3
0
0
0
0
0
0
0
0
SUBADDRESS
X
1
D3
D2
0
0
0
0
1
1
1
1
D2 D1 D0
LSB
D1
0
0
1
1
0
0
1
1
ACK
LSB
D0
MSB
0
1
0
1
0
1
0
1
DATA 1 to DATA n
INPUT SELECT
INPUT GAIN
VOLUME
NOT USED
BASS USED
TREBLE USED
SPEAKER ATTENUATE "R"
SPEAKER ATTENUATE "L"
DATA
MUTE
MUTE
28dB
IN2
SUBADDRESS
LSB
ACK
P