TDA7415CBTR STMicroelectronics, TDA7415CBTR Datasheet - Page 29

• Manufacturer Part Number: TDA7415CBTR
• Description: IC PROCESSOR CAR SGNL 6CH 64LQFP
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr
• Series: -r

Specifications of TDA7415CBTR

• Applications: DVD
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7415CB
Note:
5.4
six soft-mute pins low (hardware-mute) or by assessing the corresponding programming bits
(software-mute).
For the In-section, a soft-mute is always stereo for each of the three signal-paths and the
bus-triggered mute exactly corresponds to the pin-triggered mute, with the exception that
the later is inherently faster in response. This behavior is also true for the Out-section, but
here the bus-triggered mute is independent for all six single L/R-channels.
All mute-pins have internal pull-ups connected to a 3,3Volts reference that allow the
connection to either a 3,3V- or a 5V-microproccessor. Reverse flowing currents are limited to
100µA, so that the mute-pins may be driven by both, open-drain or push-pull outputs.
The envelope slope of the soft-mute was realized in a special S-shaped curve to soften the
mute transitions in the critical regions (see
mute is programmable by I
Figure 20. Soft-mute signal envelope versus time
A triggered mute is always completed and cannot be interrupted by a change of the initial
mute condition.
For the programming of the soft-mute, see the programming chapter.
Spectrum analyzer
A fully integrated seven-band spectrum analyzer is present in the TDA7415CB
The spectrum analyzer consists of seven band pass filters followed by rectifiers with sample
capacitors that store the maximum peak signal level for each band since the last read cycle.
This peak signal level can be read by a microprocessor at the SAout-pin. To allow easy
interfacing to an analog input-port of a microprocessor, the output voltage at this pin is
referred to device ground. Since the output voltage follows the peak level linearly, the
microprocessor should take care for a logarithmic conversion (e.g. logarithmic look-up
table).
2
C/SPI-bus in four different values.
Doc ID 14100 Rev 3
Figure
20). The completion time for full mute / no
Description of the audio processor
(Figure
29/50
21).