參數(shù)資料
型號： IDT821054A
廠商： Integrated Device Technology, Inc.
元件分類： Codec
英文描述： QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
中文描述： 四可編程PCM編解碼器的MPI接口
文件頁數(shù)： 9/42頁
文件大?。?/td> 512K
代理商： IDT821054A
9
IDT821054A QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE INDUSTRIAL TEMPERATURE
2
FUNCTIONAL DESCRIPTION
The IDT821054A is a four-channel PCM CODEC with on-chip digital
filters. It provides a four-wire solution for the subscriber line circuitry in
digital switches. The IDT821054A converts analog voice signals to
digital PCM samples and digital PCM samples back to analog voice
signals. The digital filters are used to bandlimit the voice signals during
conversion.
High
performance
Converters (ADC) and Digital-to-Analog Converters (DAC) in the
IDT821054A provide the required conversion accuracy. The associated
decimation and interpolation filtering is performed by both dedicated
hardware and Digital Signal Processor (DSP). The DSP also handles all
other necessary procession such as PCM bandpass filtering, sample
rate conversion and PCM companding.
oversampling
Analog-to-Digital
2.1
MPI/PCM INTERFACE
A serial Microprocessor Interface (MPI) is provided for the master
device to control the IDT821054A. Two PCM buses are provided to
transfer the digital voice data.
2.1.1
MICROPROCESSOR INTERFACE (MPI)
The internal configuration registers (local/global), the SLIC signaling
interface and the Coefficient-RAM of the IDT821054A are programmed
by the master device via MPI, which consists of four lines (pins): CCLK,
CS
, CI and CO. All commands and data are aligned in byte (8 bits) and
transferred via the MPI interface. CCLK is the clock of the MPI interface.
The frequency of CCLK can be up to 8.192 MHz.
CS
is the chip
selection pin. A low level on
CS
enables the MPI interface. CI and CO
are data input and data output pins, carrying control commands and
data bytes to/from the IDT821054A.
The data transfer is synchronized to the CCLK signal. The contents
of CI is latched on the rising edges of CCLK, while CO changes on the
falling edges of CCLK. The CCLK signal is the only reference of CI and
CO pins. Its duty and frequency may not necessarily be standard.
When the
CS
pin becomes low, the IDT821054A treats the first byte
on the CI pin as command and the rest as data. To write another
command, the
CS
pin must be changed from low to high to finish the
previous command and then changed from high to low to indicate the
start of a new command. When a read/write operation is completed, the
CS
pin must be set to high in 8-bit time.
During the execution of commands that are followed by output data
byte(s), the IDT821054A will not accept any new commands from the CI
pin. But the data transfer sequence can be interrupted by setting the
CS
pin to high at any time. See
Figure - 1
and
Figure - 2
for examples of
MPI write and read operation timing diagrams.
Figure - 1 An Example of the MPI Interface Write Operation
Figure - 2 An Example of the MPI Interface Read Operation (ID = 81H)
7
6
5
4
3
2
1
0
Command Byte
Data Byte 1
Data Byte 2
High 'Z'
CCLK
CI
CO
CS
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Command Byte
Identification Code
Data Byte 1
High 'Z'
'0'
'0'
'0'
'0'
'0'
'0'
'1'
'1'
6
5
4
3
2
1
0
7
Ignored
CCLK
CI
CO
7
6
5
4
3
2
1
0
CS
相關(guān)PDF資料
PDF描述
IDT821054APF QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
IDTAS4624 0.5ヘ LOW VOLTAGE, SINGLE SPDT ANALOG SWITCH
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IDTAS4684NBG 0.5 OHM, DUAL SPDT ANALOG SWITCH
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
IDT821054APF 功能描述:IC PCM CODEC QUAD MPI 64-TQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821054APF8 功能描述:IC PCM CODEC QUAD MPI 64-TQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821054APFG 功能描述:IC PCM CODEC QUAD MPI 64-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821054APFG8 功能描述:IC PCM CODEC QUAD MPI 64-TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
IDT821054PQF 功能描述:IC PCM CODEC QUAD MPI 64-PQFP RoHS:否 類別:集成電路 (IC) >> 接口 - 編解碼器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- 類型:立體聲音頻 數(shù)據(jù)接口:串行 分辨率（位）:18 b ADC / DAC 數(shù)量:2 / 2 三角積分調(diào)變:是 S/N 比，標(biāo)準(zhǔn) ADC / DAC (db):81.5 / 88 動態(tài)范圍，標(biāo)準(zhǔn) ADC / DAC (db):82 / 87.5 電壓 - 電源，模擬:2.6 V ~ 3.3 V 電壓 - 電源，數(shù)字:1.7 V ~ 3.3 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:48-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:48-TQFN-EP（7x7） 包裝:帶卷 (TR)
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