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PDF W89C840AF Data sheet ( Hoja de datos )
| Número de pieza | W89C840AF | |
| Descripción | 100/10Mbps Ethernet Controller | |
| Fabricantes | Winbond | |
| Logotipo |  |
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W89C840AF
Winbond LAN
W89C840AF
100/10Mbps Ethernet Controller
www.DataSheet4U.com
Publication Release Date:October 2000
-1 - Revision 1.01
1 page  
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W89C840AF
Block Diagram
PCI
long word
aligning buffer
PCI interface
data driver
PCI bus
master
PCI bus slave
controller
configuration
registers
TX FIFO
RX FIFO
receive data
DMA machine
transmit data
DMA machine
control
registers
status
registers
MII
data
buffer
MII
control
signals
Media
Access
Controller
Expansion
ROM
interface
EEPROM
access
interface
MII
memory
interface
Fig. 2 W89C840AF Block Diagram
System Diagram
System
M emory
Host
Controller
W89C840AF
Physical layer
Controller &
Transceiver
Media
W 89C840AF Typical Application
Fig. 3
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Publication Release Date:October 2000
-5 - Revision 1.01
5 Page 
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W89C840AF
3,74,85,8
8,97,103,
109,115,
120
Functional Description
Power management functions
The W89C840AF supports power management as defined in the PCI Bus Power Management
Interface Specification Rev 1.0 and Network Device Class Power Management Reference
Specification V1.0a and ACPI Specification Rev 1.0. These three specifications define how a PCI
network device can be controlled in an Operating System Directed Power Management (OSPM)
environment.
Power management state and wake-Up events operation
A power management event (PME) is a device used to report events that might change the system’s
power state. Typically, a device uses a PME to request a change from a power savings state to the fully
operational power state. However, a device could use a PME to request a change to a lower power state.
The following two power management events for W89C840AF are defined in Network Device Class
Power Management Reference Specification V1.0a.
Magic Packet: Magic packet is a packet composed of a sequence of specific bits pattern and is used to
notice mother board to run a wake-up process. It is consisted of the form of Destination Mac address +
Source MAC address + data + CRC.
Wake-up frame:
Wake-Up events notification
The W89C840AF can wake-up the system when it receive a frame that matches as a wake-up packet.
This packet can be configured to be one or both of the the following:
l Magic Packet (see Magic Packet).
l The received wake-up frame matches one of the W89C840AF active address filtering and CRC
check mechanisms.
The W89C840AF can be enabled to provided wake-up notification upon the occurrence of a PME. The
system software enables the PMEB signal (pin 118) by setting the PME_EN bit in the Power Management
Control and Status Register (FPMCSR) and clear this bit deassert the PMEB signal. When a wake-up event
is detected, the W89C840AF sets the PME_STS bit in the FPMCSR register setting this bit causes the PMEB
signal to be asserted. Assertion of the PMEB signal causes external hardware to be wake up the system.
If there is not any power supplying PCI slot and W89C840AF, the PMEB signal will stay at low when
W89C840AF adapter card is inserted into PCI slot.
The W89C840AF detects the network for receipt of Magic Packet and wake-up frame can be enabled to
www.DgaentearaStehea ewta4kUe-u.cponmotification by setting the MGPE and WUPFE bit of Wake-Up Control and Status
-11 -
Publication Release Date:October 2000
Revision 1.01
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