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參數(shù)資料
| 型號(hào)： | PCM4108 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | HIGH-PERFORMANCE, 24-BIT, 216kHz SAMPLING, EIGHT-CHANNEL AUDIO DIGITAL-TO-ANALOG CONVERTER |
| 中文描述： | 高性能，24位，216kHz的最大采樣，八聲道音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 20/39頁 |
| 文件大小： | 551K |
| 代理商： | PCM4108 |
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SBAS354 JUNE 2005
www.ti.com
20
AUDIO SERIAL PORT
The audio serial port provides a common interface to
digital signal processors, digital interface receivers (AES3,
S/PDIF), and other digital audio devices. The port
operates as a slave to the processor, receiver, or other
clock generation circuitry. Figure 9 illustrates a typical
audio serial port connection to a processor or receiver. The
audio serial port is comprised of six signal pins: BCK (pin
20), LRCK (pin 21), DATA0 (pin 22), DATA1 (pin 23),
DATA2 (pin 24), and DATA3 (pin 25).
LRCK
BCK
DATA0
DATA1
DATA2
DATA3
FSX
CLKX
DX0
DX1
DX2
DX3
System Clock
PCM4108
DSP
SCKI
Figure 9. Audio Serial Port Connections for Left-
Justified, Right-Justified, and I
2
S Formats
The LRCK pin functions as either the left/right word clock
or the frame synchronization clock, depending upon the
data format selected. The LRCK frequency is equal to the
input sampling frequency (44.1kHz, 48kHz, 96kHz, etc.).
The BCK pin functions as the serial data clock input. This
input is referred to as the bit clock. The bit clock runs at an
integer multiple of the input sampling frequency. Typical
multiples include 32, 48, 64, 96, 128, 192, and 256,
depending upon the data format, word length, and system
clock frequency selected.
The DATA0, DATA1, DATA2, and DATA3 pins are the
audio data inputs. When using Left-Justified, Right-
Justified, or I
2
S data formats, the DATA0 pin carries the
audio data for channels 1 and 2, the DATA1 pin carries the
audio data for channels 3 and 4. The DATA2 pin carries
audio data for channels 5 and 6, and the DATA3 pin carries
audio data for channels 7 and 8.
When using TDM data formats, the data input pins are
re-defined. When using Single or Dual Rate sampling
modes, DATA0 and DATA2 are connected together. All
eight channels are carried on a single data connection,
with the SUBA (pin 17) and SUBB (pin 18) inputs
determining the subframe utilized to source the data for
channel Bank A (channels 14), or channel Bank B
(channels 58). Refer to Figure 13 for frame details. When
using TDM formats with Quad Rate sampling, both SUBA
and SUBB are forced low. DATA0 serves as the data input
for channels 14, while DATA2 serves as the input for
channels 58. Refer to Figure 14 for frame details.
The audio serial port data formats are shown in Figure 10,
Figure 13, and Figure 14. Data formats are selected by
using the FMT[2:0] bits in Control Register 7 in Software
mode, or by using the FMT0 (pin 33), FMT1 (pin 34), and
FMT2 (pin 35) inputs in Standalone mode. In Software
mode, the user may also select the phase (normal or
inverted) for the LRCK input, as well as the data sampling
edge for the BCK input (either rising or falling edge). The
reset default conditions for the Software mode are normal
phase for LRCK and rising edge data sampling for BCK.
The PCM audio data must be binary two’s complement,
MSB first for all data formats.
P
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| PCM4108CPAPR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-PERFORMANCE, 24-BIT, 216kHz SAMPLING, EIGHT-CHANNEL AUDIO DIGITAL-TO-ANALOG CONVERTER |
| PCM4108CPAPT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-PERFORMANCE, 24-BIT, 216kHz SAMPLING, EIGHT-CHANNEL AUDIO DIGITAL-TO-ANALOG CONVERTER |
| PCM4108PAPR | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-PERFORMANCE, 24-BIT, 216kHz SAMPLING, EIGHT-CHANNEL AUDIO DIGITAL-TO-ANALOG CONVERTER |
| PCM4108PAPT | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-PERFORMANCE, 24-BIT, 216kHz SAMPLING, EIGHT-CHANNEL AUDIO DIGITAL-TO-ANALOG CONVERTER |
| PCM-410A | 制造商:ADVANTECH 制造商全稱:Advantech Co., Ltd. 功能描述:Riser Card & I/O Modules |
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