TDA7512 Datasheet, PDF (20/42 Pages) STMicroelectronics – AM/FM CAR RADIO TUNER IC WITH INTELLIGENT SELECTIVITY SYSTEM ISS

TDA7512
to the TDA7512 will be considered as Data. The internal address will be automatically incremented. After each
word receipt the TDA7512 will answer with an "acknowledge".
1.8.8 Read Operation
If the master sends a slave address word with the R/W bit set to "1", the TDA7512 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 (MPOUT,1 = multipath present, 0 = no multipath)
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)
2. Software Specification
The interface protocol comprises:
– start condition (S)
– chip address byte
– subaddress byte
– sequence of data (N bytes + Acknowledge)
– stop condition (P)
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