DM336P Davicom Semiconductor Incorporated, DM336P Datasheet - Page 4

• Manufacturer Part Number: DM336P
• Manufacturer: Davicom Semiconductor Incorporated

• 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 Block Diagram
DM6383 Features
• Control interface support
• Supports parallel and serial interfaces
• Includes a micro-controller 80C31
• Maximum access 128K bytes external program
• Maximum access 64K bytes external data memory
• Provides automatic configuration capability to
• Configuration selectable by software
• Interrupt lines selectable
• I/O base conflict avoidable
4
IRQ & R/W Control
memory
Industry
RS 232 Interface
PC Address Bus
PC Data Bus
PnP Control
Logic
V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
Virtual 16550
U A R T
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.
• Includes a virtual 16550A UART compatible parallel
• Fully programmable serial interface:
• Includes I/O control logic for modem control
interface
- 6-, 7- or 8-bit characters
- Even, odd, or no-parity bit generation and
- 1 and 2 stop bit generation
- Baud rate generation
interface
Mode Selection
detection
I/O Control Logic
Micro-Controller
8 0 3 1
Version: DM336P-DS-F02
DM336P
External ROM,
RAM Interface
Modem Control
Interface
August 15, 2000
Final