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STA304A Datasheet DIGITAL AUDIO PROCESSOR

Manufacturer: STMicroelectronics

Overview: STA304A DIGITAL AUDIO PROCESSOR WITH MULTICHANNEL DDX™ „ STA304AEND TO END DIGITAL AUDIO INTEGRATED SOLUTION „ · DSP Functions: - DIGITAL VOLUME CONTROL - SOFT MUTE - BASS and TREBLE - PARAMETRIC EQ PER CHANNEL - BASS MANAGEMENT FOR SUBWOOFER - AUTO MUTE ON ZERO INPUT DETECTION „ 4+1 DIRECT DIGITAL AMPLIFICATION (DDX™) OUTPUT CHANNELs „ 6 CHANNELs PROGRAMMABLE SERIAL OUTPUT INTERFACE (by default I2S) „ 4 CHANNELs PROGRAMMABLE SERIAL INPUT INTERFACE (by default I2S) „ STEREO S/PDIF INPUT INTERFACE „ Intel AC'97 LINK (rev. 2.1) INPUT INTERFACE FOR AUDIO AND CONTROL „ ON CHIP AUTOMATIC INPUT SAMPLING FREQUENCY DETECTION „ 100 dB SNR SAMPLE RATE CONVERTER (1KHz SINUSOIDAL INPUT) „ I2C CONTROL BUS -„ LOW POWER 3.3V CMOS TECHNOLOGY )BLOCK DIAGRAM t(sSA SCL SDA 11 10 9 ucLRCKI/ SYNC dBICKI / BIT_CL 3 4 roSDI_1 / SDATA_OUT 1 SDI_2 / SDATA_IN 2 PRXP 18 bsolete RXN 19 I2S S/PDIF I2C SRC AC`97 TQFP44 ORDERING NUMBER: STA304A t(s)„ EMBEDDED PLL FOR INTERNAL CLOCK cGENERATION (1024x48 kHz = 49.152 MHz) u„ 6.144 MHz EXTERNAL INPUT CLOCK OR dBUILT-IN INDUSTRY STANDARD XTAL roOSCILLATOR „ VARIABLE DIGITAL GAIN UP TO 24dB P(0.75dB STEP) te1.

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General Description

leThe STA304A Digital Audio Processor is a single ochip device implementing end to end digital solution sfor audio application.

In conjunction with STA500 bpower bridge it gives the full digital DSP-to-power Ohigh quality chain with no need for audio Digital-to- Analog converters between DSP and power stage.

ROM DSP RAM DDX I2S 29 LEFT_A 30 LEFT_B 27 RIGHT_A 28 RIGHT_B 33 SLEFT_A 34 SLEFT_B 23 SRIGHT_A 24 SRIGHT_B 21 LFE_A 22 LFE_B 43 LRCKO 43 BICKO 43 SDO_1 43 SDO_2 43 SDO_3 RESET 7 PLL PowerDown 35 EAPD April 2010 14 15 XTI XTO 43 CKOUT 44 PWDN 1/31 STA304A 1.0 DESCRIPTION (continued) The device supports two main configurations as far as input sources: AC'97 input or IIS/SPDIF input: selection is made via a dedicated pin (AC97_MODE pin).

Key Features

  • The selection of the operating mode is done via a specific bit in a Vendor Reserved register (see bit 0: AC97_FC_mode in the CRA register, address 5Ah). The 'Full Compliant' mode is compliant with rev. 2.1 of AC`97 link specifications. This link can provide up to 6 input audio channels with sampling frequency of 44.1, 48, 88.2, 96 kHz, and the related controls. In the IIS/SPDIF mode, a stereo S/PDIF and a 4 channels three-wires programmable serial input interface work in mutually exclusive.

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