參數(shù)資料
型號(hào): EVAL-ADAU1442EBZ
廠商: Analog Devices Inc
文件頁(yè)數(shù): 69/93頁(yè)
文件大?。?/td> 0K
描述: BOARD EVAL FOR ADAU1442
標(biāo)準(zhǔn)包裝: 1
系列: SigmaDSP®
主要目的: 音頻,音頻處理
嵌入式: 是,DSP
已用 IC / 零件: ADAU1442
主要屬性: 單芯片多通道 28/56 位音頻 DSP
次要屬性: I²C & SPI 接口
已供物品: 電路板,線纜,說(shuō)明文檔,GPIO 子板,電源
ADAU1442/ADAU1445/ADAU1446
Data Sheet
Rev. D | Page 70 of 92
AUXILIARY ADC
auxiliary ADC that can be used for control input signals. There is
one ADC with four multiplexed inputs. The ADC samples at a
rate of fCORE/896 (192 kHz when based on a 172.032 MHz core
clock), which results in an effective sampling rate of fCORE/3584
(48 kHz when based on a 172.032 MHz core clock) per channel.
An ADC filtering function is included in the hardware, and
hysteresis is available to reduce the effects of noise on the input.
More information on these settings is available in Table 70.
The auxiliary ADC is not designed for audio and, therefore,
should not be used as an auxiliary audio input. The sample and
bit rates are too low to convert signals for audio applications.
The input can be filtered using several methods. The specific
filtering modes can be set as described in Table 70.
AUXILIARY ADC MODES AND SETTINGS
ADC Filter Mode Register (Address 0xE224)
Table 69. Bit Descriptions of Register 0xE224
Bit Position
ADC Channel
[15:8]
Reserved
[7:6]
ADC0
[5:4]
ADC1
[3:2]
ADC2
[1:0]
ADC3
Table 70. Settings of Bits[7:0], Register 0xE224
Mode Setting
Function
Default
00
Filter bypass
00
01
ADC data filtered
10
Filtered with 1-bit hysteresis
11
Filtered with 2-bit hysteresis
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