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参数资料
| 型号： | DS2165Q |
| 厂商： | DALLAS SEMICONDUCTOR |
| 元件分类： | Codec |
| 英文描述： | A/MU-LAW, ADPCM CODEC, PQCC28 |
| 封装： | PLASTIC, LCC-28 |
| 文件页数： | 4/18页 |
| 文件大小： | 313K |
| 代理商： | DS2165Q |
DS2165/DS2165Q
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TIME SLOT RESTRICTIONS
Under certain conditions, the DS2165 does contain some restrictions on the output time slots that are
available. These restrictions are covered in detail in a separate application note. No restrictions occur if
the DS2165 is operated in the hardware mode.
INPUT TO OUTPUT DELAY
With all three compressions algorithms, the total delay, from the time the PCM data sample is captured
by the DS2165 to the time it is output, is always less than 375
s. The exact delay is determined by the
input and output time slots selected for each channel.
CHANNEL ASSOCIATED SIGNALING
The DS2165 supports Channel Associated Signaling (CAS) via its ability to automatically change from
the 32 kbps compression algorithm to the 24 kbps algorithm. If the DS2165 is configured to perform the
32 kbps algorithm, then in both the hardware and software mode it will sense the frame sync inputs (FSX
and FSY) for a double-wide frame sync pulse. Whenever the DS2165 receives a double-wide pulse, it
will automatically switch from the 32kbps algorithm to the 24kbps algorithm. Switching to the 24kbps
algorithm allows the user to insert signaling data into the LSB bit position of the ADPCM output because
this bit does not contain any useful speech information.
ON-THE-FLY ALGORITHM SELECTION
In the software mode, the user can switch between the three available algorithms on-the-fly. That is, the
DS2165 does not need to be reset or stopped to make the change from one algorithm to another. The
DS2165 reads the Control Register before it starts to process each PCM or ADPCM sample. If the user
wishes to switch algorithms, then the Control Register must be updated via the serial port before the first
input sample to be processed with the new algorithm arrives at either XIN or YIN. The PCM and
ACPCM outputs will tristate during register updates.
相关PDF资料 |
PDF描述 |
|---|---|
| DS2165QN | A/MU-LAW, ADPCM CODEC, PQCC28 |
| DS2172T | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| DS2172TN | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| DS2172 | SPECIALTY TELECOM CIRCUIT, PQFP32 |
| DS2175S | DATACOM, ELASTIC BUFFER, PDSO16 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2165Q/T&R | 制造商:Maxim Integrated Products 功能描述:ADPCM PROCESSOR, 16/24/32KB PLCC - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC PROC ADPCM 16/24/32K 28-PLCC 制造商:Maxim Integrated Products 功能描述:Audio DSPs 16/24/32kbps ADPCM Processor |
| DS2165Q/T&R+ | 制造商:Maxim Integrated Products 功能描述:ADPCM PROCESSOR 32KBPS PLCC T&R LF - Tape and Reel |
| DS2165Q/T&R | 功能描述:音频 DSP 16/24/32kbps ADPCM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| DS2165Q+ | 功能描述:音频 DSP 16/24/32kbps ADPCM Processor RoHS:否 制造商:Texas Instruments 工作电源电压: 电源电流: 工作温度范围: 安装风格: 封装 / 箱体: 封装:Tube |
| DS2165Q+T&R | 制造商:Maxim Integrated Products 功能描述:ADPCM PROCESSOR 28PLCC - Tape and Reel 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述:IC PROC ADPCM 16/24/32K 28-PLCC |
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