IDT821054PQFG

更新时间： 2024-01-23 01:02:52

品牌	Logo	应用领域
艾迪悌 - IDT		解码器编解码器电信集成电路电信电路 PC
页数	文件大小	规格书
45页	495K
描述
PCM Codec, A/MU-Law, 1-Func, PQFP64, PLASTIC, QFP-64

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技术参数
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IDT821054PQFG 技术参数

生命周期：	Transferred	零件包装代码：	QFP
包装说明：	PLASTIC, QFP-64	针数：	64
Reach Compliance Code：	compliant	HTS代码：	8542.39.00.01
风险等级：	5.83	压伸定律：	A/MU-LAW
滤波器：	YES	JESD-30 代码：	S-PQFP-G64
JESD-609代码：	e0	长度：	14 mm
功能数量：	1	端子数量：	64
工作模式：	SYNCHRONOUS	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	QFP	封装形状：	SQUARE
封装形式：	FLATPACK	认证状态：	Not Qualified
座面最大高度：	2.45 mm	标称供电电压：	5 V
表面贴装：	YES	电信集成电路类型：	PROGRAMMABLE CODEC
温度等级：	INDUSTRIAL	端子面层：	TIN LEAD
端子形式：	GULL WING	端子节距：	0.8 mm
端子位置：	QUAD	宽度：	14 mm

IDT821054PQFG 数据手册

IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE

INDUSTRIAL TEMPERATURE RANGE

interface and the Coefficient-RAM of the IDT821054 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 IDT821054.

FUNCTIONAL DESCRIPTION

The IDT821054 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 IDT821054 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 oversampling Analog-to-Digital

Converters (ADC) and Digital-to-Analog Converters (DAC) in the

IDT821054 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.

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 IDT821054 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.

2.1

MPI/PCM INTERFACE

A serial Microprocessor Interface (MPI) is provided for the master

device to control the IDT821054. Two PCM buses are provided to

transfer the digital voice data.

During the execution of commands that are followed by output data

byte(s), the IDT821054 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.

2.1.1

MICROPROCESSOR INTERFACE (MPI)

The internal configuration registers (local/global), the SLIC signaling

CCLK

Command Byte

Data Byte 1

Data Byte 2

High 'Z'

Figure - 1 An Example of the MPI Interface Write Operation

CCLK

Ignored

Command Byte

Identification Code

Data Byte 1

High 'Z'

'1' '0' '0' '0' '0' '0' '0' '1'

Figure - 2 An Example of the MPI Interface Read Operation (ID = 81H)

1...6 7 8910 11 12...45

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与IDT821054PQFG相关器件

型号	品牌	描述	获取价格	数据表
IDT821064	IDT	QUAD PROGRAMMABLE PCM CODEC WITH GCI INTERFACE	获取价格
IDT821064PM	IDT	PCM Codec, A/MU-Law, 4-Func, PQFP64	获取价格
IDT821064PQF	IDT	QUAD PROGRAMMABLE PCM CODEC WITH GCI INTERFACE	获取价格
IDT821068	IDT	OCTAL PROGRAMMABLE PCM CODEC	获取价格
IDT821068PX	IDT	OCTAL PROGRAMMABLE PCM CODEC	获取价格
IDT821068PX8	IDT	PCM Codec, A/MU-Law, 8-Func, PQFP128	获取价格

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