DM6381F datasheet(22/40 Pages) ETC

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DM336P

V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set

Final

Version: DM336P-DS-F02

August 15, 2000

• Chip 2: DM6381/DM6382 ITU-T V.34 TX and RX Digital Signal Processor (TX DSP and

RX DSP) Description

DM6381/82 Description

The DM6381/DM6382 are application specific Digital

Signal Processors (DSP) dedicated to V.34 modem

operation. They are used in pairs. The primary

component of these devices is a 22.43Mips DSP core

processor. The basic clock frequency of this device is

40.32MHz. An internal built PLL circuit is used to

boost the clock from 40.32MHz to 80.64MHz or

89.74MHz. This 80.64MHz/89.74MHz clock is used

as the clock source of DSP core processor. A 16-byte

dual port SRAM is utilized to provide the

communication between DSP and the DM6383.

There are two dedicated serial ports that provide the

link between the DSP and the DM6380. The

DM6381/DM6382 are bonded-out in a 100-pin QFP

package for mass production, and provide the most

economical package.

DM6381/82 Block Diagram

Timing

Logical & PLL

Serial Port

Dual Port

RAM

ROM

DSP Core

Data

RAM

Program

RAM

OSCI

OSCO

MSCLK

CODEC_CLK

PMA[0:13]

PMD[0:23]

DMA[0:13]

DMD[0:15]

DM6381/82 Features

• DM6381 for TX data-pump, DM6382 for RX data-

pump

• Build in program ROM

• 2 serial ports to interface with codec

• 16 byte dual port RAM

• Clock Generator for codec chip and controller chip

• Build in PLL

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