參數(shù)資料
型號(hào)： PCM1792DBG4
廠商： Texas Instruments
文件頁(yè)數(shù)： 13/61頁(yè)
文件大?。?/td> 0K
描述： IC DAC 24BIT STER 192KHZ 28-SSOP
產(chǎn)品培訓(xùn)模塊： Data Converter Basics
標(biāo)準(zhǔn)包裝： 47
位數(shù)： 24
數(shù)據(jù)接口： I²C，串行，SPI?
轉(zhuǎn)換器數(shù)目： 2
電壓電源： 模擬和數(shù)字
工作溫度： -25°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 28-SSOP（0.209"，5.30mm 寬）
供應(yīng)商設(shè)備封裝： 28-SSOP
包裝： 管件
輸出數(shù)目和類型： 2 電壓，單極
采樣率（每秒）： 200k
PCM1792
SLES069B MARCH 2003 REVISED NOVEMBER 2006
www.ti.com
20
FUNCTION DESCRIPTIONS
Zero Detect
The PCM1792 has a zero-detect function. When the PCM1792 detects the zero conditions as shown in Table 2, the
PCM1792 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 and equal number of 1s and 0s in every 8 bits of DSD
input data for 200 ms.
DSD
DZ1
The input data is 1001 0110 continuously for 200 ms.
Serial Control Interface
The PCM1792 supports SPI and I2C that sets 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 I2C 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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PCM1793 制造商:TI 制造商全稱:Texas Instruments 功能描述:24 BIT 192KHZ SAMPLING ADVANCED SEGMENT AUDIO STEREO DIGITAL TO ANALOG CONVERTER
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PCM1793DB 制造商:Texas Instruments 功能描述:D/A CONVERTER (D-A) IC
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