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| 型號： | PCM1792A |
| 英文描述： | 24-bit,192-khz sampling,advanced segment, audio stereo digital-to-analog converter |
| 中文描述： | 24位,192 - kHz的采樣，先進(jìn)的部分，立體聲音頻數(shù)字模擬轉(zhuǎn)換器 |
| 文件頁數(shù)： | 20/59頁 |
| 文件大?。?/td> | 500K |
| 代理商： | PCM1792A |
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SLES105B FEBRUARY 2004 REVISED NOVEMBER 2006
www.ti.com
20
FUNCTION DESCRIPTIONS
Zero Detect
The PCM1792A has a zero-detect function. When the PCM1792A detects the zero conditions as shown in Table 2, the
PCM1792A sets ZEROL (pin 1) and ZEROR (pin 2) to HIGH.
Table 2. Zero Conditions
MODE
DETECTING CONDITION AND TIME
PCM
DATA is continuously LOW for 1024 LRCKs.
External DF Mode
DATA is continuously LOW for 1024 WDCKs.
DSD
DZ0
There are an equal number of 1s and 0s in every 8 bits of DSD
input data for 200 ms.
DZ1
The input data is 1001 0110 continuously for 200 ms.
Serial Control Interface
The PCM1792A supports SPI and I
2
C serial control interfaces that set the mode control registers as shown in Table 4. This
serial control interface is selected by MSEL (pin 3); SPI is activated when MSEL is set to LOW, and I
2
C is activated when
MSEL is set to HIGH.
SPI Interface
The SPI interface is a 4-wire synchronous serial port which operates asynchronously to the serial audio interface and the
system clock (SCK). The serial control interface is used to program and read the on-chip mode registers. The control
interface includes MDO (pin 13), MDI (pin 11), MC (pin 12), and MS (pin 10). MDO is the serial data output, used to read
back the values of the mode registers; MDI is the serial data input, used to program the mode registers; MC is the serial
bit clock, used to shift data in and out of the control port, and MS is the mode control enable, used to enable the internal
mode register access.
Register Read/Write Operation
All read/write operations for the serial control port use 16-bit data words. Figure 29 shows the control data word format.
The most significant bit is the read/write (R/W) bit. For write operations, the R/W bit must be set to 0. For read operations,
the R/W bit must be set to 1. There are seven bits, labeled IDX[6:0], that hold the register index (or address) for the read
and write operations. The least significant eight bits, D[7:0], contain the data to be written to, or the data that was read from,
the register specified by IDX[6:0].
Figure 30 shows the functional timing diagram for writing or reading the serial control port. MS is held at a logic 1 state until
a register needs to be written or read. To start the register write or read cycle, MS is set to logic 0. Sixteen clocks are then
provided on MC, corresponding to the 16 bits of the control data word on MDI and readback data on MDO. After the eighth
clock cycle has completed, the data from the indexed-mode control register appears on MDO during the read operation.
After the sixteenth clock cycle has completed, the data is latched into the indexed-mode control register during the write
operation. To write or read subsequent data, MS must be set to 1 once.
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| PCM1792ADB | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHz Smplng AdvSegment Ster DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1792ADB | 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC |
| PCM1792ADBG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 192kHz Sampling Adv Seg Aud St DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1792ADBR | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24-Bit 192kHz Smplng AdvSegment Ster DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
| PCM1792ADBRG4 | 功能描述:音頻數(shù)/模轉(zhuǎn)換器 IC 24B 192kHz Sampling Adv Seg Aud St DAC RoHS:否 制造商:Texas Instruments 轉(zhuǎn)換器數(shù)量: 分辨率:16 bit 接口類型:I2S, UBS 轉(zhuǎn)換速率: 信噪比:98 dB 工作電源電壓:5 V DAC 輸出端數(shù)量:2 工作溫度范圍:- 25 C to + 85 C 電源電流:23 mA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-32 封裝:Reel |
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