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STA306 Schematic ( PDF Datasheet ) - STMicroelectronics

Teilenummer STA306
Beschreibung MULTICHANNEL DIGITAL AUDIO PROCESSOR
Hersteller STMicroelectronics
Logo STMicroelectronics Logo 




Gesamt 30 Seiten
STA306 Datasheet, Funktion
STA306
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MULTICHANNEL DIGITAL AUDIO PROCESSOR WITH DDX™
PRODUCT PREVIEW
s 6 DDXTM Channels Capability (24 bit)
s From 32kHz to 192kHz Input Sample Rates
Supported
s Volume Control from 0 to -127 dB (0.5 dB steps)
s Variable Digital Gain from 0 to 24dB (0.5dB
steps) with Digital Limiter Functionality and
Variable Attack and Release Time
s I2S Inputs and Outputs
s Individual Channel and Master Gain/
Attenuation
s Individual Channel Mute and Zero Input Detect
Auto-Mute
s Selectable Serial Audio Data Interface
s Bass/Treble Controls
s Channel Mapping of any Input to any
Processing/DDXTM Channel
s Active Crossover Capability
s DC Blocking Selectable High-Pass Filter
s Selectable Bass Management on Channel 6
s Selectable Adjacent Channel Mixing Capability
s Selectable Clock Input Ratio
s Selectable De-emphasis
s Selectable DDXTM Ternary, or Binary PWM
output
s AM Interference Reduction Mode
s I2C Control
TQFP64
ORDERING NUMBER: STA306
DESCRIPTION
The STA306 is a single chip solution for digital audio
processing and control in multi-channel applications.
It provides output capabilities for DDXTM (Direct Digi-
tal Amplification). In conjunction with a DDXTM power
device, it provides high-quality, high-efficiency, all
digital amplification. The device is extremely versatile
allowing for input of most digital formats including
192kHz, 24-bit DVD-Audio.
The internal 24-bit DSP allows for high resolution
processing at all standard input sample frequencies.
Processing includes volume control, filtering, bass
management, gain compression/limiting and PCM
and DDXTM outputs. Filtering includes five user-pro-
grammable 28-bit biquads for EQ per channel, as
well as bass, treble and DC blocking. External clock-
ing can be provided at 4 different ratios of the input
sample frequency. All sample frequencies are up-
sampled for processing. Each internal processing
channel can receive any input channel, allowing flex-
ibility and the ability to perform active digital cross-
over for powered loudspeaker systems.
The serial audio data interface accepts many differ-
ent formats, including the popular I2S format. STx-
channels of DDX processing are performed.
October 2003
This is preliminary information on a new product foreseen to be developed. Details are subject to change without notice.
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STA306 Datasheet, Funktion
STA306
ELECTRICAL CHARACTERISTCS (VDD3 = 3.3V ± 0.3V; VDD = 2.5V ± 0.2V; Tamb = 0 to 70 °C; unless other-
wise specified)
GENERAL INTERFACE ELECTRICAL CHARACTERISTICS
Symbol
Parameter
Test Condition
Min. Typ. Max. Unit Note
Iil Low Level Input no pull-up
Vi = 0V
1 µA 1
Iih High Level Input no pull-down
Vi = VDD3
2 µA 1
IOZ Tristate output leakage without Vi = VDD3
pullup/down
2 µA 1
Vesd Electrostatic Protection
Leakage < 1µA
2000
V2
Note 1: The leakage currents are generally very small, < 1na. The values given here are maximum after an electrostatic stress on the pin.
Note 2: Human Body Model
DC ELECTRICAL CHARACTERISTICS: 3.3V BUFFERS
Symbol
Parameter
Test Condition
VIL Low Level Input Voltage
VIH High Level Input Voltage
VILhyst Low Level Threshold
Input Falling
VIHhyst High Level Threshold
Input Rising
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Vhyst
Vol
Schmitt Trigger Hysteresis
Low Level Output
IoI = 100uA
Voh High Level Output
Ioh = -100uA
Ioh = -2mA
Min.
2.0
0.8
1.3
0.3
VDD3-0.2
2.4
Typ.
Max.
0.8
1.35
2.0
0.8
0.2
Unit
V
V
V
V
V
V
V
V
DC ELECTRICAL CHARACTERISTICS: 2.5V BUFFERS
Symbol
Parameter
Test Condition
VILst
Low Level Input Voltage
Schmitt input
VIHst
High Level Input Voltage
Schmitt input
VILhyst Low Level Threshold
non Schmitt, Input
Falling
VIHhyst High Level Threshold
non Schmitt, Input
Rising
Vhyst
Schmitt Trigger Hysteresis
VOL Low Level Output
Note 1
VOH High Level Output
Note 1
Notes: 1. Source/Sink current under worst-case conditions.
Min.
0.7*VDD
Typ.
Max.
0.26*VDD
0.5*VDD
Unit
V
V
V
1.3 0.5*VDD 2.0
V
0.23*VDD
0.85*VDD
0.15*VDD
V
V
V
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6 Page









STA306 pdf, datenblatt
STA306
3.0.3 Bass Management Enable
BIT R/W RST NAME
DESCRIPTION
5 R/W
0
BME
Bass Management Enable : 0 – No Bass Management
1 – Bass Management operation on channel 6, scale and add inputs
Channel 6 of the STA306 features a bass management mode that enables redirection of information in all other
channels to this channel and which can then be filtered appropriately using the EQ(Biquad) section. Setting the
BME bit selects the output of the scale and mix block for channel 6 instead of the output of the channel mapping
block. The settings for the scale and mix block are provided by the CxBMS registers
3.0.4 Max Power Correction
BIT R/W RST NAME
DESCRIPTION
7 R/W
1
MPC
Max Power Correction : Setting of 1 enables DDX correction for THD reduction
near maximum power output.
Setting the MPC bit turns on special processing that corrects the DDX power device at high power. This mode
should lower the THD+N of a full DDX system at maximum power output and slightly below. This mode will only
be operational in OM= 00 or 10.
3.1 Configuration Register B (address 01h)
BIT D7 D6 D5 D4
NAME
DRC
ZCE
SAIFB
SAI2
RST 0 1 0 0
D3
SAI1
0
D2
SAI0
0
D1
ZDE
1
D0
DSPB
0
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3.1.1 DSP Bypass
BIT R/W
RST
0 R/W
0
NAME
DSPB
DESCRIPTION
DSP Bypass Bit : 0 – Normal Operation
1 – Bypass of Biquad and Bass/Treble Functionality
Setting the DSPB bit bypasses the biquad and bass/treble functionality of the STA306.
3.1.2 Zero-Detect Mute Enable
BIT R/W RST
NAME
DESCRIPTION
1 R/W
1
ZDE
Zero-Detect Mute Enable : Setting of 1 enables the
automatic zero-detect mute
Setting the ZDE bit enables the zero-detect automatic mute.
The zero-detect circuit looks at the input data to each processing channel after the channel mapping block. If
any channel receives 2048 consecutive zero value samples (regardless of fs) then that individual channel is
muted if this function is enabled.
12/33

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