收藏本站
CS4245
4. APPLICATIONS
4.1
4.2
Recommended Power-Up Sequence
1. Hold RESET low until the power supply, MCLK1, MCLK2 (if used), LRCK1 and LRCK2 are stable. In
this state, the Control Port is reset to its default settings.
2. Bring RESET high. The device will remain in a low power state with the PDN bit set by default. The con-
trol port will be accessible.
3. The desired register settings can be loaded while the PDN bit remains set.
4. Clear the PDN bit to initiate the power-up sequence.
System Clocking
The CS4245 will operate at sampling frequencies from 4 kHz to 200 kHz. This range is divided into three
speed modes as shown in Table 1 .
Mode
Single-Speed
Double-Speed
Quad-Speed
Sampling Frequency
4-50 kHz
50-100 kHz
100-200 kHz
Table 1. Speed Modes
The CS4245 has two serial ports which may be operated synchronously or asynchronously. Serial port 1
consists of the SCLK1 and LRCK1 signals and clocks the serial audio output, SDOUT. Serial port 2 consists
of the SCLK2 and LRCK2 signals and clocks the serial audio input, SDIN.
Each serial port may be independently placed into Single, Double, or Quad Speed mode. The serial ports
may also be independently placed into Master or Slave mode.
4.2.1
4.2.2
30
Synchronous / Asynchronous Mode
By default, the CS4245 operates in Synchronous Mode with both serial ports synchronous to MCLK1. In
this mode, the serial ports may operate at different synchronous rates as set by the ADC_FM and
DAC_FM bits, and MCLK2 does not need to be provided (the MCLK2 pin may be left unconnected).
If the Asynch bit is set (see “Asynchronous Mode (Bit 0)” on page 46 ), the CS4245 will operate in asyn-
chronous mode. The serial ports will operate asynchronously with Serial Port 1 clocked from MCLK1 and
Serial Port 2 clocked from MCLK2. In this mode, the serial ports may operate at different asynchronous
rates.
Master Clock
In Asynchronous Mode, MCLK1/LRCK1 and MCLK2/LRCK2 must maintain an integer ratio. In synchro-
nous mode MCLK1/LRCK1 and MCLK1/LRCK2 must maintain an integer ratio. Some common ratios are
shown in Table 2 .The LRCK frequency is equal to Fs, the frequency at which audio samples for each
channel are clocked into or out of the device. The ADC_FM and DAC_FM bits and the MCLK Freq bits
(See “MCLK Frequency - Address 05h” on page 45. ) configure the device to generate the proper clocks
DS656F3
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
CDB42L55 BOARD EVAL FOR CS42L55 CODEC
CDB44L11 EVALUATION BOARD FOR CS44L11
CDB48500-USB KIT USB EVALUATION FOR CDB48500
CDB5378 EVALUATION BOARD FOR CS5378
CDB5460AU EVALUATION BOARD FOR CS5460A
CDB5461AU BOARD EVAL & SOFTWARE CS5461A
CDB5466U BOARD EVAL & SOFTWARE CS5466 ADC
CDB5467U BOARD EVAL FOR CS5467 ADC
相关代理商/技术参数
CDB42518 功能描述:音频 IC 开发工具 Eval Bd 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
CDB42528 功能描述:音频 IC 开发工具 Eval Bd 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
CDB4265 功能描述:音频 IC 开发工具 Eval Bd 192kHz CODEC w/PGA & Input Mux 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
CDB4270 功能描述:音频 IC 开发工具 Eval Bd 105dB 192kHz CODEC 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
CDB4271 功能描述:音频 IC 开发工具 Eval Bd CS4271 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
CDB4272 功能描述:音频 IC 开发工具 Eval Bd CS4272 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
CDB4299 功能描述:音频 IC 开发工具 Eval Bd AC’97 CODEC w/SRC 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
CDB42L50 制造商:CIRRUS 制造商全称:Cirrus Logic 功能描述:Low Voltage, Stereo CODEC with headphone Amp