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參數(shù)資料
| 型號： | ADAU1701 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | SigmaDSP 28/56-Bit Audio Processor with 2ADC/4DAC |
| 中文描述： | SigmaDSP的28/56-Bit音頻處理器2ADC/4DAC |
| 文件頁數(shù)： | 31/43頁 |
| 文件大?。?/td> | 625K |
| 代理商： | ADAU1701 |
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Preliminary Technical Data
ADAU1701
MULTIPURPOSE PINS
Table 37. Multipurpose Pin Configuration Registers
Register
MP_CFG0 (2080)
MP_CFG1 (2081)
Rev. PrF | Page 31 of 43
Bits[23:20]
MP5[3:0]
MP11[3:0]
Bits[19:16]
MP4[3:0]
MP10[3:0]
Bits[15:12]
MP3[3:0]
MP9[3:0]
Bits[11:8]
MP2[3:0]
MP8[3:0]
Bits[7:4]
MP1[3:0]
MP7[3:0]
Bits[3:0]
MP0[3:0]
MP6[3:0]
The ADAU1701 has 12 multipurpose (MP) pins that can be
individually programmed to be used as serial data inputs, serial
data outputs, digital control inputs and outputs to and from the
SigmaDSP core, or as inputs to the four-channel auxiliary ADC.
These pins allow the ADAU1701 to be used with external ADCs
and DACs, take analog or digital inputs to control settings such
as volume control, or output digital signals to drive LED
indicators.
MULTIPURPOSE PIN CONFIGURATION REGISTERS
Each multipurpose pin can be set to its different functions from
these registers (2080-2081). These two three-byte registers are
broken up into twelve 4-bit (nibble) sections that each control a
different MP pin as detailed in Table 37. Table 38 lists the
different functions of each nibble setting within the MP Pin
Configuration Registers. The MSB of each MP pin’s 4-bit
configuration inverts the input to or output from the pin. The
MP pins will have an internal pull-up resistor (approximately
10 kΩ) enabled when they are set to digital inputs (either GPIO
input or serial data port input).
Table 38. Multipurpose Pin Configuration Register Bit
Functions
MPx[3:0]
Pin Function
1111
Aux ADC input (see Table 40)
1110
Reserved
1101
Reserved
1100
Serial Data Port – inverted (see Table
44)
1011
Open Collector Output - inverted
1010
GPIO Output – inverted
1001
GPIO Input, no debounce – inverted
1000
GPIO Input, debounced – inverted
0111
N/A
0110
Reserved
0101
Reserved
0100
Serial Data Port (see Table 44)
0011
Open Collector Output
0010
GPIO Output
0001
GPIO Input, no debounce
0000
GPIO Input, debounced
GPIO PIN SETTING REGISTER
This register gives the user access through the control port to
set the GPIO pins. High or low settings can be directly written
to or read from this register after setting bit 7 of the Core
Control Register. This register is updated once every LRCLK
frame (1/fs)
Table 39. GPIO Pin Setting Register (2056)
Register Bits
Function
15:12
Unused
11
MP11 setting
10
MP10 setting
9
MP9 setting
8
MP8 setting
7
MP7 setting
6
MP6 setting
5
MP5 setting
4
MP4 setting
3
MP3 setting
2
MP2 setting
1
MP1 setting
0
MP0 setting
AUXILIARY ADC
The ADAU1701 has a four-channel auxiliary 8-bit ADC that
can be used to connect a potentiometer to control volume, tone,
or other parameter settings in the DSP program. Each of the
four channels is sampled at the audio sampling frequency (f
S
),
which defaults to 48 kHz with a 12.288 MHz crystal connected
to the ADAU1701 oscillator. Full-scale input on this ADC is
3.3V, so the step size is approximately 13mV (3.3V/256 steps).
The input resistance of the ADC is approximate 20 kΩ. Table 40
indicates which four MP pins are mapped to the four channels
of the aux ADC. The aux ADC is enabled for those pins by
writing 1111 to the appropriate pin’s portion of the
Multipurpose Pin Configuration Registers.
The auxiliary ADC is turned on by writing a 1 to bit 15 of the
Aux ADC enable register (Table 42).
Noise on the ADC input could cause the digital output to be
constantly changing by a few LSBs. In cases where the aux ADC
is used as a volume control, this would cause small gain
fluctuations. To avoid this, a low-pass filter or hysteresis can be
added to the aux ADC signal path. These functions can be
enabled through the Auxiliary ADC & Power Control Register
(2082), shown in Table 41. The filter is enabled by default when
the aux ADC is enabled. When data is read from the aux ADC
registers, 2 bytes (12 bits of data, plus zero-padded LSBs) are
available because of this filtering.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADAU1701JSTZ | 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:SigmaDSP® 其它有關文件:STA321 View All Specifications 標準包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應商設備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| ADAU1701JSTZ-RL | 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:SigmaDSP® 其它有關文件:STA321 View All Specifications 標準包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應商設備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
| ADAU1701MINIBZ | 制造商:Analog Devices 功能描述:EVAL BD SIGMADSPMULTICHANAUDIO PROCESSOR - Bulk |
| ADAU1702 | 制造商:AD 制造商全稱:Analog Devices 功能描述:SigmaDSP 28-56-Bit Audio Processor with Two ADCs and Four DACs |
| ADAU1702JSTZ | 功能描述:IC AUDIO PROC 2ADC/4DAC 48-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 音頻處理 系列:SigmaDSP® 其它有關文件:STA321 View All Specifications 標準包裝:1 系列:Sound Terminal™ 類型:音頻處理器 應用:數(shù)字音頻 安裝類型:表面貼裝 封裝/外殼:64-LQFP 裸露焊盤 供應商設備封裝:64-LQFP EP（10x10） 包裝:Digi-Reel® 其它名稱:497-11050-6 |
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