37987

Warning: Operation at or beyond these limit may result in permanent damage to the device. Normal operation is not guaranteed at these extremes.

The 37987 is an integrated circuit implementing a fully digital, integrated and advanced solution to perform the signal processing in front of the power amplifier and behind the AM/FM tuner or any other audio source. The chip integrates two 45 MIPs DSP  cores: one for stereo decoding, noise blanking, weak signal processing and multipath detection and one for sound processing, Dolby B, echo and noise cancelling for the telephone.

An I²C/SPI interface is implemented for control and communication with the main micro. A separate SPI is available to interface the display micro.The DSP cores are integrated with their associated data and program memories. The peripherals and interfaces I2C, SPI, Serial Audio Interface (SAI), PLL Oscillator, External Memory Interface, (EMI), General Purpose I/O register (Port A) and the D/A registers are connected to and controlled by DSP0, whereas the A/D registers, the SPDIF and the General Purpose I/O register (Port B) are connected to and controlled by DSP1. An hardware RDS filter , demodulator and decoder block is also embedded. No support is needed from the DSPs but at initialisation so that RDS can work in background and in parallel with other DSP processing. Separated Debug and Test Interfaces are connected to both DSP cores.

The 37987 is supposed to be used in kit with the TDA7501 or any other device of the same family. Thanks to the serial audio interface also digital sources can be processed and a direct output to a digital bus is also available.

The flexibility allowed by the wide memory space and by the two powerfull DSP cores make the 37987 usable for different applications. In example, inside the main radio as an audio co-processor or to perform the signal processing and equalisation associated to a digital power amplifier