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| 型号： | TAS3202PAG |
| 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： | 10/66页 |
| 文件大小： | 817K |
| 代理商： | TAS3202PAG |
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SLES208B – JUNE 2009 – REVISED MARCH 2011
www.ti.com
5
Clock Controls
Clock management for the TAS3202 consists of two control structures:
Master clock management
–
Oversees the selection of the clock frequencies for the 8051 microprocessor, the I2C controller, and
the audio DSP core
–
The master clock (MCLK_IN or XTAL_IN) is the source for these clocks.
–
In most applications, the master clock drives an on-chip digital phase-locked loop (DPLL), and the
DPLL output drives the microprocessor and audio DSP clocks.
–
Also available is the DPLL bypass mode, in which the high-speed master clock directly drives the
microprocessor and audio DSP clocks.
Serial audio port (SAP) clock management
–
Oversees SAP master/slave mode
–
Controls output of SCLKOUT, and LRCLK in the SAP master mode
Input pin MCLK_IN or XTAL_IN provides the master clock for the TAS3202. Within the TAS3202, these
two inputs are combined by an OR gate and, thus, only one of these two sources can be active at any one
time. The source that is not active must be logic 0.
The TAS3202 only supports dynamic sample-rate changes between any of the supported sample
frequencies when a fixed-frequency master clock is provided. During dynamic sample-rate changes, the
TAS3202 remains in normal operation and the register contents are preserved. To avoid producing audio
artifacts during the sample-rate changes, a volume or mute control can be included in the application
firmware that mutes the output signal during the sample-rate change. The fixed-frequency clock can be
provided by a crystal attached to XTAL_IN and XTAL_OUT or an external 3.3-V fixed-frequency TTL
source attached to MCLK_IN.
When the TAS3202 is used in a system in which the master clock frequency (fMCLK ) can change, the
TAS3202 must be reset during the frequency change. In these cases, the procedure shown in Figure 5-1
should be used.
18
Clock Controls
Copyright 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): TAS3202
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相关代理商/技术参数 |
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|---|---|
| TAS3202PAGR | 功能描述:音频 DSP Hi Perf Dig Aud SOC 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 |
| TAS3204 | 制造商:TI 制造商全称:Texas Instruments 功能描述:AUDIO DSP WITH ANALOG INTERFACE |
| TAS3204EVM | 功能描述:音频 IC 开发工具 TAS3204EVM Eval Mod RoHS:否 制造商:Texas Instruments 产品:Evaluation Kits 类型:Audio Amplifiers 工具用于评估:TAS5614L 工作电源电压:12 V to 38 V |
| TAS3204EVM-LC | 制造商:Texas Instruments 功能描述:TAS3204EVM EVALUATION MODULE - Boxed Product (Development Kits) |
| TAS3204PAG | 功能描述:音频 DSP Hi Perf Dual Core DSP/MCU Aud Proc 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 |
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