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DM560P

V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set

Davicom Semiconductor, Inc. 

DM560P

V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set

Chip 1: Modem Controller Unit with PnP for ISA

DM6583 Description

The DM6583 MCU performs general modem control

functions, and is also designed to provide Plug and

The DM6583 Modem Control Unit is designed for

Play capability for ISA bus systems. The Plug and

use in high speed internal and external modem

Play logic supports software or automatic Plug and

applications. The DM6583 interface is compatible

Play selectable I/Os to allow users to configure the

with the DM6581/DM6582 Transmit and Receive

internal modem card without jumpers.

Digital Signal Processors. The DM6583 incorporates

a 80C32 micro-controller, a virtual 16550A UART

with FIFO mode, and Plug & Play control logic.

DM6583 Block Diagram

Mode Selection

PC Data Bus

PC Address Bus

IRQ & R/W Control

PnP Control

Logic

Virtual 16550

UART

8032

Micro-Controller

External ROM,

RAM Interface

RS 232 Interface

I/O Control Logic

Modem Control

Interface

DM6583 Features

• Control interface support

• Supports parallel and serial interfaces

• Includes a 80C32 micro-controller

• 256K bytes maximum external program memory

• 64K bytes maximum external data memory

• Provides automatic Plug and Play or software

configuration capabilities

• 8 selectable Interrupts

• Conflict free I/O base address selection

• Virtual 16550A UART compatible parallel

interface

• Fully programmable serial interface:

- 6, 7 or 8-bit characters

- Even, odd, mark and none parity bit generation

and detection

- 1 and 2 stop bit generation

- Baud rate generation

- Includes I/O control logic for modem control

interface

4

Preliminary

Version: DM560P-DS-P07

August 11, 2000

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