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| TDA8440 Datasheet, PDF (5/12 Pages) NXP Semiconductors – Switch for CTV receivers | |||
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Philips Semiconductors
Switch for CTV receivers
Product speciï¬cation
TDA8440
I2C BUS CONTROL
Detailed information on the I2C bus is available on request.
Table 2 TDA8440 I2C bus protocol.
STA A6 A5 A4 A3 A2 A1 A0 R/W AC D7 D6 D5 D4 D3 D2 D1 D0 AC
STO
STA = start condition
A6
=1
Fixed address bits
A5
=0
Fixed address bits
A4
=0
Fixed address bits
A3
=1
Fixed address bits
A2 = sub-address bit, ï¬xed via S2 input
A1 = sub-address bit, ï¬xed via S1 input
A0 = sub-address bit, ï¬xed via S0 input
R/W = read/write bit (has to be 0, only write mode allowed)
AC = acknowledge bit (= 0) generated by the TDA8440
D7 = 1 audio la is selected to audio output a
D7 = 0 audio la is not selected
D6 = 1 audio lla is selected to audio output a
D6 = 0 audio lla is not selected
D5 = 1 audio lb is selected to audio output b
D5 = 0 audio lb output is not selected
D4 = 1 audio llb is selected to audio output b
D4 = 0 audio llb is not selected
D3 = 1 video l is selected to video output
D3 = 0 video l is not selected
D2 = 1 video ll is selected to video output
D2 = 0 video ll is not selected
D1 = 1 video ampliï¬er gain is times 2
D1 = 0 video ampliï¬er gain is times 1
D0 = 1 OFF-input inactive
D0 = 0 OFF-input active
STO = stop condition
OFF FUNCTION
With the OFF input all outputs can be switched off (mode high ohmic), depending on the value of D0.
November 1985
5
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