TDA7511 Datasheet, PDF (19/41 Pages) STMicroelectronics – AM/FM TUNER FOR CAR RADIO AND HIFI APPLICATIONS

TDA7511
Write Operation
Following a START condition the master sends a slave address word with the R/W bit set to "0". The TDA 7511
will generate an "acknowledge" after this first transmission and will wait for a second word (the word address
field). This 8-bit address field provides an access to any of the 32 internal addresses. Upon receipt of the word
address the TDA 7511 slave device will respond with an "acknowledge". At this time, all the following words
transmitted to the TDA 7511 will be considered as Data. The internal address will be automatically incremented.
After each word receipt the TDA 7511 will answer with an "acknowledge".
Read Operation
IF the master sends a slave address word with the R/W bit set to "1", the TDA 7511 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)
Figure 1.
CHIP ADDRESS
SUBADDRESS
DATA1 - DATAn
MSB
LSB
MSB
LSB
MSB
S 1 1 0 0 0 1 0 X ACK T T I A4 A3 A2 A1 A0 ACK
ACK = Acknowledge
S = Start
P = Stop
I = Pagemode
X = R/W Bit
DATA
LSB
ACK P
99AT0054
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