TDA7786 datasheet(14/54 Pages) STMICROELECTRONICS

14 / 54 page

Function description

TDA7786, TDA7786M

14/54

DocID026122 Rev 5

Figure 3. Crystal oscillator block diagram

2.11

DSP and digital hardware accelerators

The TDA7786x embeds two DSP cores for high computational power and achievable

customization. The DSP cores, in combination with the hardware accelerators, take care of

all the tuner digital signal processing. The main program is fixed in ROM. Control

parameters are copied to RAM and are accessible and modifiable there, thus allowing a

parametric performance optimization. The operations performed by the DSP cores and HW

accelerators are:



digital down-conversion of IF



bandwidth selection with variable controlled bandwidth



FM and AM noise blanking



FM/AM demodulation with soft-mute, high-cut, weak signal processing and quality

detection



FM stereo decoding with stereo-blend



RDS demodulation including error correction and block synchronization with generation

of an RDS interrupt for the main µP



Autonomous control of RDS-AF tests



Self-alignment of pre-selection tuning

TDA7786 数据表(PDF) 14 Page - STMicroelectronics