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參數(shù)資料
| 型號： | XWM8728EDS |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | 24-bit, 192kHz Stereo DAC with Volume Control and DSD Support |
| 中文描述： | 24位，192kHz立體聲DAC，具有音量控制和渠務(wù)署支持 |
| 文件頁數(shù)： | 17/28頁 |
| 文件大小： | 266K |
| 代理商： | XWM8728EDS |
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WM8728
Product Preview
WOLFSON MICROELECTRONICS LTD
PP Rev 1.2 April 2001
17
SOFTWARE CONTROL INTERFACE
The software control interface may be operated using a 2-wire interface compatible or 3-wire (SPI-
compatible) interface.
SELECTION OF CONTROL MODE
The WM8728 may be programmed to operate in hardware or software control modes. This is
achieved by setting the state of the MODE pin.
MODE
0
1
INTERFACE FORMAT
Hardware Control Mode
Software Control Mode
Table 5 Control Interface Mode Selection
3-WIRE (SPI COMPATIBLE) SERIAL CONTROL MODE
In this mode, SDIDEM is used for the program data, SCKDSD is used to clock in the program
data and LATI2S is used to latch in the program data. The 3-wire interface protocol is shown in
Figure 14.
LATI2S
SCKDSD
SDIDEM
B15
B6
B7
B8
B9
B10
B11
B12
B13
B14
B1
B2
B3
B4
B5
B0
Figure 14 3-Wire Serial Interface
Notes:
1.
2.
3.
B[15:9] are Control Address Bits
B[8:0] are Control Data Bits
CSBIWL needs to be low during writes
–
see Figure 5
2-WIRE SERIAL CONTROL MODE
In 2-wire mode, which is the default, SDIDEM is used for the program data and SCKDSD is used
to clock in the program data see Figure 15.
WM8728 has an address of 001101X (binary) which represents an audio device. The final
address digit is dependent on pin CSBIWL, which should be tied to either DVDD or DGND. This
allows the device to have a choice of two identification header addresses used in the 2 wire
interface word. This feature allows more than one WM8728 device to be present on the interface
bus.
LATI2S should be tied to either DVDD or DGND, as it is unused. This pin if toggled from low to
high and high to low, will cause the device to enter the 3-wire interface mode and cannot be
placed back into 2-wire mode except by toggling the MODE pin, or powering off the device.
SDIDEM
SCKDSD
ACK
R ADDR
ACK
DATA B15-8
STOP
START
DATA B7-0
R/W
ACK
Figure 15 2-Wire Serial Interface
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XWM8728EDS/R | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz Stereo DAC with Volume Control |
| XWM8729ED | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:24-bit, 192kHz Stereo DAC |
| XWM8731EDS | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:Portable Internet Audion CODEC with Headphone Driver and Programmable Sample Rates |
| XWM8733ED | 制造商:WOLFSON 制造商全稱:WOLFSON 功能描述:102dB Stereo DAC |
| XWM8734EDS | 功能描述:接口—CODEC Stereo CODEC RoHS:否 制造商:Texas Instruments 類型: 分辨率: 轉(zhuǎn)換速率:48 kSPs 接口類型:I2C ADC 數(shù)量:2 DAC 數(shù)量:4 工作電源電壓:1.8 V, 2.1 V, 2.3 V to 5.5 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:DSBGA-81 封裝:Reel |
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