DM9008 Ver la hoja de datos (PDF) - Davicom Semiconductor, Inc.
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DM9008 Datasheet PDF : 68 Pages
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Introduction to the Plug&Play Function of DM9008
The Plug&Play is a mechanism to provide automatic
configuration ability to ISA card in the PC. About the Plug&Play
Specification, please reference to "Plug and Play ISA
Specification" issued by Intel Corporation and Microsoft
Corporation. The DM9008 follows this industry standard to
allow Plug&Paly software to program its configuration. The
Plug&Play Software includes Windows 95, Intel Plug&Play
unilities, Plug&Paly BIOS and etc. For the PC without
Plug&Play environment, DM9008 also supports Plug&Play
auto-detection facility to solve the configuration disabled
problem. So, the DM9008 can work properly in both Plug&Play
and Non-Plug&Play computer.
Three Mode Supported by DM9008
To meet the different requirements, DM9008 offers three
operation modes. Those modes can be programmed in
EEPROM. DM9008 will change the operation mode only when
the hardware reset is occurred. Those will be described as
follows:
DM9008
ISA/Plug & Play Super Ethernet Contoller
1. Auto-detection mode: DM9008 will detect the PC
environment automatically. If the environment without
Plug&Play Software executed, DM9008 will set itself to
be jumperless mode and the initial configuration is set
by EEPROM Otherwise, the DM9008 configuration is
programmed by Plug&Play software.
2. Jumperless mode: In this mode, the DM9008
configuration cannot be programmed by Plug&Play
software and only decided by EEPROM.
3. Plug&Play mode: The initial configuration for DM9008
is disabled. It needs the Plug&Play Software to
program its configuration.
Two Initial Key Software by DM9008
The Initial Key is provided by DM9008 to drive the Plug&Play
logic to accept the command. The Initial Key defined by
Plug&Play Spec is called as PnP Initial Key. Another Initial Key
only defined by DM9008 is called as DM Initial Key. Both of
them include a series of writing (32 I/O writes) to the Address
Port. The PnP Initial Key will drive all Plug&Play ISA card. The
DM Initial Key will effects the DM9008 adapter only.
66
Final
Version: DM9008-DS-F02
November 30, 2000
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