参数资料
型号: PCM1792DB
厂商: Texas Instruments
文件页数: 44/61页
文件大小: 0K
描述: IC 24BIT AUDIO STEREO DAC 28SSOP
产品培训模块: Data Converter Basics
标准包装: 47
位数: 24
数据接口: I²C,串行,SPI?
转换器数目: 2
电压电源: 模拟和数字
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: 2 电压,单极
采样率(每秒): 200k
产品目录页面: 903 (CN2011-ZH PDF)
其它名称: 296-15313-5
PCM1792
SLES069B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
49
58 BCK
Command Field
DID
LRCK
BCK
DI
DCO1
DCI2
Device ID = 1
Device ID = 2
DCO1
DCO2
DCI3
DCO29
DCI30
Device ID = 3
Device ID = 30
Figure 57. 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 PCM1792 has two audio channels that can be selected by OPE (register 19). If this OPE bit is
not set to HIGH, those audio channels are transferred. Figure 58 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 58. General TDMCA Frame
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PCM1792DB 制造商:Texas Instruments 功能描述:24BIT AUDIO DAC SMD 1792 SSOP28
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