- 您现在的位置：买卖IC网 > PDF目录98159 > TAS5028PAGR (TEXAS INSTRUMENTS INC) SPECIALTY CONSUMER CIRCUIT, PQFP64 PDF资料下载
参数资料
| 型号： | TAS5028PAGR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | GREEN, PLASTIC, TQFP-64 |
| 文件页数： | 36/86页 |
| 文件大小： | 1201K |
| 代理商： | TAS5028PAGR |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页当前第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页
TAS5028 Controls and Status
33
SLES112 — June 2004
TAS5028
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 Bass or Treble
coefficients, the current selected bank is updated. If audio data is streaming to the TAS5028, during a manual
bank selection, the TAS5028 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 un - mute 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.
If MCLK or SCLK is stopped, the TAS5028 performs a bank switch operation. If the clocks should start up once
the manual bank switch command has been received, the bank switch operation is performed during the 5-ms
silent start sequence.
2.5.2 Automatic Bank Selection
To enable automatic bank selection, a value of 3 is written into in the bank selection bits of the bank control
register. Banks are associated with one or more sample rates by writing values into the Bank 1 or Bank 2 data
rate selection registers. The automatic base selection is performed when a frequency change is detected
according to the following scheme:
1.
The system scans Bank 1 data rate associations to see if the Bank 1 is assigned for that data rate.
2.
If Bank 1 is assigned, then the Bank 1 coefficients will be loaded.
3.
If it is not then, the system scans the bank 2 to see if Bank 1 is assigned for that data rate.
4.
If Bank 2 is assigned, then the Bank 2 coefficients will be loaded.
5.
If it is not then, the system loads the Bank 3 coefficients.
The default is that all frequencies are enabled for Bank 1. This default is expressed as a value of all 1s in the
Bank 1 auto-selection byte and all 0s in the bank 2 auto - section byte.
2.5.2.1
Coefficients Write Operations While Automatic Bank Switch Is Enabled
In automatic mode if a write occurs to the Tone coefficient, the bank that is written to is the current bank.
2.5.3 Bank Set
Bank set is used to provide a secure way to update the bank coefficients in both the manual and automatic
switching modes without causing a bank switch to occur. Bank set mode does not alter the current bank
register mapping. It simply enables any bank’s coefficients to be updated while inhibiting any bank switches
from taking place. In manual mode, this enables the coefficients to be set without switching banks. In automatic
mode this prevents a clock error or data rate change from corrupting a bank coefficient write.
To update the coefficients of a bank, a value of 4, 5, or 6 is written into in the bank selection bits of the bank
control register. This enables the Tone coefficient values of bank 1, 2, or 3 to be respectively updated.
Once the coefficients of the bank have been updated, the bank selection bits are then returned to the desired
manual or automatic bank selection mode.
2.5.4 Bank Switch Timeline
After a bank switch is initiated (manual or automatic), no I2C writes to the TAS5028 should occur before a
minimum of 186 ms. This value is determined by the volume ramp rates for a particular sample rate.
2.5.5 Bank Switching Example 1
Problem: The audio unit containing a TAS5028 needs to handle different audio formats with different sample
rates. Format #1 requires Fs = 32 kHz, Format #2 requires Fs = 44.1 kHz, and Format #3 requires Fs = 48 kHz.
The sample-rate dependent parameters in the TAS5028 require different coefficients and data depending on
the sample rate.
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5028PAGG4 | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| TAS5028PAGRG4 | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| TAS5036AIPFC | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036APFC | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| TAS5036AIPFCR | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5028PAGRG4 | 功能描述:音频 DSP 8 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| TAS5036 | 制造商:TI 制造商全称:Texas Instruments 功能描述:SIX CHANNEL DIGITAL AUDIO PWM PROCESSOR |
| TAS5036A | 制造商:TI 制造商全称:Texas Instruments 功能描述:Six Channel Digital Audio PWM Processor |
| TAS5036A_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:Six Channel Digital Audio PWM Processor |
| TAS5036AIPFC | 功能描述:音频放大器 Digital Audio PWM Processor RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。