TDA7540B datasheet(36/75 Pages) STMICROELECTRONICS

Part #	TDA7540B

Description	AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS)

PDF	75 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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36 / 75 page

Functional description

TDA7540B

36/75

page mode. Than again subaddresse hex60 has to be transmitted for following registers

above 32.

After each word receipt the TDA7540 will answer with an "acknowledge".

4.5.8

Read operation

If the master sends a slave address word with the R/W bit set to "1", the TDA7540 will transit

one 8-bit data word. This data word includes the following informations:

bit0 (ISS filter, 1 = ON, 0 = OFF)

bit1 (ISS filter bandwidth, 1 = 80kHz, 0 = 120kHz)

bit2 (STEREO,1 = STEREO, 0 = MONO)

bit3 (1 = PLL is locked in , 0 = PLL is locked out).

bit4 (fieldstrength indicator, 1 = lower as softmute threshold, 0 = higher as softmute

threshold)

bit5 (adjacent channel indicator, 1 = adjacent channel present, 0 = no adjacent channel)

bit6 (deviation indicator, 1 = strong overdeviation present, 0 = no strong overdeviation)

bit7 (deviation indicator, 1 = overdeviation present, 0 = no overdeviation)

TDA7540B Datasheet(PDF) 36 Page - STMicroelectronics