
DM336P
V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
4
Final
Version: DM336P-DS-F02
August 15, 2000
Chip 1 : DM6383 Modem Controller Unit With PnP For ISA (MCU)
DM6383 Description
The DM6383 Modem Control Unit (MCU) is designed
for use in high speed internal and external modem
applications. Its interface is compatible with the
DM6381/DM6382 Transmit and Receive Digital
Signal Processor Chipset. The DM6383 incorporates
a micro-controller 80C31, virtual 16550A UART (with
FIFO mode), I/O and Plug & Play control logic. The
DM6383 MCU performs the general modem control
functions. It is also designed to provide Plug and Play
capability for ISA bus systems by implementing PnP
control logic. The PnP logic supports hardware &
software selectable options to allow users to
configure the internal modem card without jumpers.
DM6383 Block Diagram
8031
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
DM6383 Features
Control interface support
Supports parallel and serial interfaces
Includes a micro-controller 80C31
Maximum access 128K bytes external program
memory
Maximum access 64K bytes external data memory
Provides automatic configuration capability to
Industry
Configuration selectable by software
Interrupt lines selectable
I/O base conflict avoidable
Includes a virtual 16550A UART compatible parallel
interface
Fully programmable serial interface:
- 6-, 7- or 8-bit characters
- Even, odd, or no-parity bit generation and
detection
- 1 and 2 stop bit generation
- Baud rate generation
Includes I/O control logic for modem control
interface