DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
4
Preliminary
Version: DM560P-DS-P07
August 11, 2000
Chip 1: Modem Controller Unit with PnP for ISA
DM6583 Description
The DM6583 Modem Control Unit is designed for
use in high speed internal and external modem
applications. The DM6583 interface is compatible
with the DM6581/DM6582 Transmit and Receive
Digital Signal Processors. The DM6583 incorporates
a 80C32 micro-controller, a virtual 16550A UART
with FIFO mode, and Plug & Play control logic.
The DM6583 MCU performs general modem control
functions, and is also designed to provide Plug and
Play capability for ISA bus systems. The Plug and
Play logic supports software or automatic Plug and
Play selectable I/Os to allow users to configure the
internal modem card without jumpers.
DM6583 Block Diagram
8032
Micro-Controller
I/O Control Logic
Virtual 16550
UART
PC Data Bus
IRQ & R/W Control
RS 232 Interface
Mode Selection
External ROM,
RAM Interface
Modem Control
Interface
PC Address Bus
PnP Control
Logic
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
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