参数资料
型号: EVAL-ADAU1446EBZ
厂商: Analog Devices Inc
文件页数: 65/92页
文件大小: 0K
描述: BOARD EVAL FOR ADAU1446
标准包装: 1
系列: SigmaDSP®
主要目的: 音频,音频处理
嵌入式: 是,DSP
已用 IC / 零件: ADAU1446
主要属性: 单芯片多通道 28/56 位音频 DSP
次要属性: I²C & SPI 接口
已供物品: 板,软件
ADAU1445/ADAU1446
Rev. A | Page 68 of 92
AUXILIARY ADC
The ADAU1445/ADAU1446 include a 10-bit 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 67.
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 67.
AUXILIARY ADC MODES AND SETTINGS
ADC Filter Mode Register (Address 0xE224)
Table 66. 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 67. 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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