參數(shù)資料
型號(hào)： 82C931
廠商： Electronic Theatre Controls, Inc.
英文描述： Plug and Play Integrated Audio Controller
中文描述： 即插即用集成音頻控制器
文件頁(yè)數(shù)： 32/64頁(yè)
文件大?。?/td> 634K
代理商： 82C931
82C931
Page 24
912-3000-035
Revision: 2.1
OPTi
To program the 931 in the I
2
S-justified mode, the MC22 and
MC21 registers need to be set. The relevant MC22 and
MC21 bit definitions are shown below for reference.
I
2
S-justified mode (ZV-port):
MC22[7:0] = "00110001" (31H).
MC21[7:0] = "10000010" (82H).
There are other I
2
S variations: left-justified and right-justified.
For the left-justified, LRCLK is high for the left channel, and
low for the right channel. The MSB is left-justified to an
LRCLK transition, with zero SCLK delay.
MC22[7:0] = "00110100" (34H).
MC21[7:0] = "10000010" (82H).
For the right-justified, LRCLK is high for the left channel, and
low for the right channel. The MSB is delayed from an LRCLK
transition, the LSB will be right-justified to the next LRCLK
transition.
MC22[7:0] = "00010100" (14H).
MC21[7:0] = "10000010" (82H).
4.8.2
This data format is essentially the same as the I
2
S right-justi-
fied format. Normally there are only 32 SCLKs in a LRCLK
period. The LRCLK is high for the left channel, and low for the
right channel. The MSB comes in first. To set up the 931 in
Sony format:
MC22[7:0] = "00000100" (04H).
MC21[7:0] = "10000010" (82H).
Sony format
1
4.8.3
AT&T PCM codec T7525 compatible 16-bit
mono format
The 931 supports the T7525 receive timing - word format with
positive FSYNC. The benefit is that the 931's secondary DAC
1.
Short right-justified format, used by OPTi's wavetable chip and the Philips TDA1311AT DAC.
could be used to save a T7525 as the voice codec in
modem/audio combo solution. To program the 931 in T7525
mode:
MC22[7:0] = "00110010" (32H)
MC21[7:0] = "10000010" (82H)
In short summary:
* The MC22[4] bit setting may vary, depending on the LRCLK
period (32 SCLK or more).
4.8.4
Testing I
2
S format (ZV port) with Audio Pre-
cision machine
The Audio Precision machine system two 2322 has a serial
audio data port that can generate a test tone in the I
2
S format
with programmable FSYNC, ranging from 24KHz to 48KHz.
The 931 was tested with AP machine in various test tones:
256Hz, 1KHz and 3KHz in both sine wave and square wave
with FSYNC = 48KHz.
To test out the feature, the AP machine is hooked up with the
931 with appropriate connections (AP's pin#6, 12, 14 are
SDATA, SCLK and FSYNC, respectively). The next step is to
setup the MC22 to “31H” and MC21 to “82H”. Then the test
tone could be heard from the speaker connected to the 931.
Please note that there might be some noise in the speaker.
This is due to unshielded cable used to connect the serial
audio interface. Shielding the cable would help improve the
audio quality.
4.8.5
Relevant MC register settings
Bit 5
First16-bit: Specifies where the data is located in the LRCLK period
0:
data located at the last 16 bits of the left/right channel in an LRCLK period
1:
data located at the first 16 (or 17) bit of the left/right channel in an LRCLK period
Bit 4
CLK32: Specifies the number of SCLKs per LRCLK period, used only in delay-mode or pulse-mode ASIO
0:
32 SCLK per LRCLK period
1:
more than 32 SCLK per LRCLK period
I
2
S-
justified
left-
justified
right-
justified
Sony
format
T7525
format
MC22[7:0]
31H*
34H*
14H*
04H*
32H
MC22[7:0]
82H
MC22 Serial Audio format control register (R/W)
Default: 00h
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
Reset ASIO
ASIO test
enable
First16-bit
CLK32
SCLK
Polarity
FSYNC
Polarity
Pulse Mode
I
2
S Mode
相關(guān)PDF資料
PDF描述
82S09 576-BIT BIPOLAR RAM (64 X 9)
82S19 576-BIT BIPOLAR RAM (64 X 9)
82S101BYA 2.6GHz Relay, 1 Form C, 0.5A 30VDC Relay, 50ohms, SMD
82S100BXA 1 MSPS, 12-Bit A/D Converter in MSOP-8 or SOIC-8; Package: MSOP; No of Pins: 8; Temperature Range: Industrial
82S101 Field Programmable Logic Array
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
82C931(100PQFP) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Soundcard Circuits
82C931(100TQFP) 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Soundcard Circuits
82C941 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC
82-CBSA-1.75X6.0X0.8 功能描述:82-CBSA-1.75X6.0X0.8--82S04--CIR 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽，分體式 高度 - 總:0.800"（20.32mm） 長(zhǎng)度 - 總:6.000"（152.40mm） 寬度 - 總:1.750"（44.45mm） 通風(fēng):通風(fēng)孔，按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:50
82-CBSA-3.75X4.5X0.8 功能描述:82-CBSA-3.75X4.5X0.8--82S12--CIR 制造商:leader tech inc. 系列:* 零件狀態(tài):在售 類型:屏蔽，分體式 高度 - 總:0.800"（20.32mm） 長(zhǎng)度 - 總:4.500"（114.30mm） 寬度 - 總:3.750"（95.25mm） 通風(fēng):通風(fēng)孔，按樣式排列 安裝類型:通孔 標(biāo)準(zhǔn)包裝:50
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*