参数资料
型号: DSD1792DBG4
厂商: Texas Instruments
文件页数: 40/57页
文件大小: 0K
描述: IC 24BIT STEREO AUD DAC 28-SSOP
产品培训模块: Data Converter Basics
标准包装: 47
位数: 24
数据接口: 串行
转换器数目: 2
电压电源: 模拟和数字
功率耗散(最大): 335mW
工作温度: -25°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SSOP(0.209",5.30mm 宽)
供应商设备封装: 28-SSOP
包装: 管件
输出数目和类型: 4 电流,单极
采样率(每秒): 200k
DSD1792
SLES067B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
45
58 BCK
Command Field
DID
LRCK
BCK
DI
DCO1
DCI2
DCO2
DCI3
DCO29
DCI30
Device ID = 1
Device ID = 2
Device ID = 3
Device ID = 30
DCO1
Figure 54. Device ID Determination Sequence
TDMCA Frame
In general, the TDMCA frame consists of the command field, extended command (EMD) field, and audio data
fields. All of them are 32 bits in length, but the lowest byte has no meaning. The MSB is transferred first for each
field. The command field is always transferred as the first packet of the frame. The EMD field is transferred if
the EMD flag of the command field is HIGH. If any EMD packets are transferred, no audio data follows the EMD
packets. This frame is for quick system initialization. All devices of a daisy chain should respond to the command
field and extended command field. The DSD1792 has two audio channels that can be selected by OPE (register
19). If the OPE bit is not set HIGH, those audio channels are transferred. Figure 55 shows the general TDMCA
frame. If some DACs are enabled, but corresponding audio data packets are not transferred, the analog outputs
are unpredictable.
LRCK
BCK
DI
CMD
EMD
CMD
Don’t
Care
EMD
DO
Ch1
Ch(m)
Ch2
CMD
CMD
Ch2
Ch3
Ch(n)
CMD
Ch1
Ch4
DI
Ch3
Ch4
[For Initialization]
[For Operation]
32 Bits
DO
CMD
1/fS
Don’t
Care
Figure 55. General TDMCA Frame
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