DM336P Davicom Semiconductor Incorporated, DM336P Datasheet - Page 22

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

• Chip 2: DM6381/DM6382 ITU-T V.34 TX and RX Digital Signal Processor (TX DSP and
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
DM6381/82 Block Diagram
DM6381/82 Features
• DM6381 for TX data-pump, DM6382 for RX data-
• Build in program ROM
• 2 serial ports to interface with codec
22
pump
C O D E C _ C L K
M S C L K
RX DSP) Description
O S C O
O S C I
Logical & PLL
Serial Port
Dual Port
T i m i n g
V.34 Integrated Data/ Fax/Voice/Speakerphone Modem Device Set
R A M
R O M
D S P C o r e
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.
• 16 byte dual port RAM
• Clock Generator for codec chip and controller chip
• Build in PLL
R A M
Data
P r o g r a m
R A M
Version: DM336P-DS-F02
DM336P
P M A [ 0 : 1 3 ]
P M D [ 0 : 2 3 ]
D M A [ 0 : 1 3 ]
D M D [ 0 : 1 5 ]
August 15, 2000
Final