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參數(shù)資料
| 型號： | TAS5504PAGRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | GREEN, PLASTIC, TQFP-64 |
| 文件頁數(shù)： | 37/96頁 |
| 文件大?。?/td> | 1216K |
| 代理商： | TAS5504PAGRG4 |
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TAS5504 Controls and Status
35
SLES123 October 2004
TAS5504
CONTROL
SETTING
Loudness (TAS5504)
Loudness disabled, default values
AM interference enable
Disabled
AM interference IF
455
AM interference select sequence
1
Tuned freq and mode
0000 , BCD
Subwoofer PSVC control
Enabled
PSVC and PSVC range
Disabled / 0 dB
After the initialization time, the TAS5504 starts the transition to the operational state with the Master volume
set at mute.
Since the TAS5504 has an external crystal time base, following the release of RESET, the TAS5504 sets the
MCLK and data rates and perform the initialization sequences. The PWM outputs are held at a mute state until
the master volume is set to a value other than mute via I2C.
2.2.2 Power Down (PDN)
The TAS5504 can be placed into the power down mode by holding the PDN terminal low. When power down
mode is entered, both the PLL and the oscillator are shut down. Volume is immediately set to full attenuation
(there is no ramp down). This control uses the PWM mute sequence that provides a low click and pop transition
to the hard mute state (M). A detailed description of the PWM mute sequence is contained in the PWM section.
Power down is an asynchronous operation that does not require MCLK to go into the power down state. To
initiate the power-up sequence requires MCLK to be operational and the TAS5504 to receive 5 MCLKs prior
to the release of PDN.
As long as the PDN terminal is held low the device is in the power down state with the PWM outputs in a hard
mute (M) state. During power down, all I2C and serial data bus operations are ignored. Table 23 shows the
device output signals while PDN is active.
Table 23. Device Outputs During Power Down
SIGNAL
SIGNAL STATE
Valid
Low
PWM P-outputs
M-state = low
PWM M-outputs
M-state = low
SDA
Signal input
PSVC
M-state = low
Following the application of PDN, the TAS5504 does not perform a quiet shutdown to prevent clicks and pops
produced during the application (the leading edge) of this command. The application of PDN immediately
performs a PWM stop. A quiet stop sequence can be performed by first applying MUTE before PDN.
When PDN is released, the system goes to the end state specified by MUTE and BKND_ERR pins and the
I2C register settings.
The crystal time base allows the TAS5504 to determine the CLK rates. Once these rates are determined, the
TAS5504 unmutes the audio.
2.2.3 Backend Error (BKND_ERR)
Backend error is used to provide error management for backend error conditions. Backend error is a level
sensitive signal. Backend error can be initiated by bringing the BKND_ERR terminal low for a minimum 5
MCLK cycles. When BKND_ERR is brought low, the PWM sets all channels into the PWM backend error state.
This state is described in the PWM section. Once the backend error sequence is initiated, a delay of 5 ms is
performed before the system starts the output reinitialization sequence. After the initialization time, the
TAS5504 begins normal operation. Backend error does not affect other PWM modulator operations
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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(chǎn)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(chǎn)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 |
| TAS5508-5142K7EVM | 功能描述:音頻 IC 開發(fā)工具 HI PERF MULTI PWM RoHS:否 制造商:Texas Instruments 產(chǎn)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 |
| TAS5508A | 制造商:TI 制造商全稱:Texas Instruments 功能描述:8 Channel Digital Audio PWM Processor |
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