1/30
STA304A
March 2002
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
a73 STA304AEND TO END DIGITAL AUDIO
INTEGRATED SOLUTION
a73 · DSP Functions:
- DIGITAL VOLUME CONTROL
- SOFT MUTE
- BASS and TREBLE
- PARAMETRIC EQ PER CHANNEL
- BASS MANAGEMENT FOR SUBWOOFER
- AUTO MUTE ON ZERO INPUT DETECTION
a73 4+1 DIRECT DIGITAL AMPLIFICATION
(DDX™) OUTPUT CHANNELs
a73 6 CHANNELs PROGRAMMABLE SERIAL
OUTPUT INTERFACE (by default I2S)
a73 4 CHANNELs PROGRAMMABLE SERIAL
INPUT INTERFACE (by default I2S)
a73 STEREO S/PDIF INPUT INTERFACE
a73 Intel AC'97 LINK (rev. 2.1) INPUT INTERFACE
FOR AUDIO AND CONTROL
a73 ON CHIP AUTOMATIC INPUT SAMPLING
FREQUENCY DETECTION
a73 100 dB SNR SAMPLE RATE CONVERTER
(1KHz SINUSOIDAL INPUT)
a73 I
2
C CONTROL BUS
a73 LOW POWER 3.3V CMOS TECHNOLOGY
a73 EMBEDDED PLL FOR INTERNAL CLOCK
GENERATION (1024x48 kHz = 49.152 MHz)
a73 6.144 MHz EXTERNAL INPUT CLOCK OR
BUILT-IN INDUSTRY STANDARD XTAL
OSCILLATOR
a73 VARIABLE DIGITAL GAIN UP TO 24dB
(0.75dB STEP)
1.0 DESCRIPTION
The STA304A Digital Audio Processor is a single
chip device implementing end to end digital solution
for audio application. In conjunction with STA500
power bridge it gives the full digital DSP-to-power
high quality chain with no need for audio Digital-to-
Analog converters between DSP and power stage.
TQFP44
ORDERING NUMBER: STA304A
PRODUCT PREVIEW
DIGITAL AUDIO PROCESSOR WITH MULTICHANNEL DDX™
BLOCK DIAGRAM
DSPSRC
I2S
AC`97
S/PDIF
DDX
I2S
PLL
I2C
RESET
LRCKI / SYNC
SDI_1 / SDATA_OUT
SDI_2 / SDATA_IN
RXP
RXN
BICKI / BIT_CL
SDO_1
SDO_2
SDO_3
LRCKO
BICKO
XTI XTO
LEFT_A
LEFT_B
RIGHT_A
RIGHT_B
SLEFT_A
SLEFT_B
SRIGHT_A
SRIGHT_B
LFE_A
LFE_B
SCL SDASA
RAM
ROM
CKOUT
18
1
2
3
4
19
11 10 9
7
14 15 43
43
43
43
43
43
22
21
24
23
34
33
28
27
30
29
PowerDown
44
35 EAPD
PWDN