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參數(shù)資料
| 型號： | TAS5504PAGG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 42/96頁 |
| 文件大?。?/td> | 1216K |
| 代理商： | TAS5504PAGG4 |
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TAS5504 Controls and Status
40
SLES123 October 2004
TAS5504
MCLK Ratio 64 Fs, 128 Fs, 196 Fs, 256 Fs, 384 Fs, 512 Fs, or 768 Fs) I2C parameter
Data Rate 32, 38, 44.1,48, 88.2, 96, 176.4, 192 kHz I2C parameter
AM Mode Enable / Disable I2C parameter
During AM interference avoidance, the clock control circuitry utilizes three other configuration inputs:
Tuned AM Frequency (for AM interference avoidance) (550 1750 kHz) I2C parameter
Frequency Set Select (14) I2C parameter
Sample Rate I2C parameter or auto detected
2.4.1 PLL Operation
The TAS5504 uses two internal clocks generated by two internal phase-locked loops (PLLs), the digital PLL
(DPLL) and the analog PLL (APLL). The analog PLL provides the reference clock for the PWM. The digital
PLL provides the reference clock for the digital audio processor and the control logic.
The master clock MCLK input provides the input reference clock for the APLL. The external 13.5-MHz crystal
provides the input reference clock for the digital PLL. The crystal provides a time base to support a number
of operations, including the detection of the MCLK ratio, the data rate, and clock error conditions. The crystal
time base provides a constant rate for all controls and signal timing.
Even if MCLK is not present, the TAS5504 can receive and store I2C commands and provide status.
2.5
Bank Controls
The TAS5504 permits the user to specify and assign sample rate dependent parameters for Biquad,
Loudness, DRC, and Tone in one of three banks that can be manually selected or selected automatically
based upon the data sample rate. Each bank can be enabled for one or more specific sample rates via I2C
bank control register 0x40. Each bank set holds the following values:
Coefficients for Seven Biquads (7X5 = 35 coefficients) for Each of the four Channels (Registers 0X51 –
0x88)
Coefficients for One Loudness Biquad (Register 0x95)
DRC1 Energy and (1 – Energy) Values (Register 0x98)
DRC1 Attack, (1 Attack), Decay, (1 – Decay) Values (Register 0x9C)
DRC2 Energy and (1 – Energy) Values (Register 0x9D)
DRC2 Attack, (1 Attack), Decay, (1 – Decay) Values (Register 0xA1)
Five Bass Filter-Set Selections (Register 0xDA)
Five Treble Filter-Set Selections (Register 0xDC)
The default selection for bank control is manual bank with bank 1 selected. Note that if bank switching is used,
Bank 2 and Bank 3 must be programmed on power up since the default values are all zeroes. If bank switching
is used and Bank 2 and Bank 3 are not programmed correctly, then the output of the TAS5504 could be muted
when switching to those banks.
2.5.1 Manual Bank Selection
The three bank selection bits of the bank control register allow the appropriate bank to be manually selected
(000 = Bank 1, 001 = Bank 2, 010 = Bank 3). In the manual mode, when a write occurs to the Biquad, DRC,
or Loudness coefficients, the current selected bank is updated. If audio data is streaming to the TAS5504,
during a manual bank selection, the TAS5504 first performs a mute sequence, then performs the bank switch,
and finally restores the volume using an un-mute sequence.
A mute command initiated by the bank switch mute sequence overrides an unmute command or a volume
command. While a mute is active, the commanded channels are muted. When a channel is unmated, the
volume level goes to the last commanded volume setting that has been received for that channel.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| TAS5504PAGR | 功能描述:音頻 DSP 4 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TAS5504PAGRG4 | 功能描述:音頻 DSP 4 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風格: 封裝 / 箱體: 封裝:Tube |
| TAS5508 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
| TAS5508-5121K8EVM | 功能描述:音頻 IC 開發(fā)工具 TAS5508-TAS5121K8 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
| TAS5508-5122C6EVM | 功能描述:音頻 IC 開發(fā)工具 TAS5508-5122C6 Eval Mod RoHS:否 制造商:Texas Instruments 產品:Evaluation Kits 類型:Audio Amplifiers 工具用于評估:TAS5614L 工作電源電壓:12 V to 38 V |
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