IP100A LF
Preliminary Data Sheet
13/97
March. 30, 2007
Copyright © 2004, IC Plus Corp.
IP100A LF-DS-R17
4
Acronyms and Glossary
LAN
Local Area Network
MAC
Media Access Control Layer, or a device implementing the functions of this layer (a Media
Access Controller)
PCI
Peripheral Component Interface
NIC
Network Interface Cards
FIFO
First In First Out
EPROM
Erasable Programmable Read Only Memory
EEPROM Electrically Erasable Programmable Read Only Memory
LED
Light Emitting Diode
PHY
Physical Layer, or device implementing functions of the Physical Layer
CSMA/CD Carrier Sense Multiple Access with Collision Detect
FCS
Frame Check Sequence
SFD
Start of Frame Delimiter
CRC
Cyclic Redundancy Check
IP
Internet Protocol
TFD
Transmit Frame Descriptor
RFD
Receive Frame Descriptor
DMA
Direct Memory Access
ACPI
Advanced Configuration and Power Management
5
Standards Compliance
The IP100A LF implements functionality compliant with the following standards:
• IEEE 802.3 Fast Ethernet
• IEEE 802.3 Full Duplex Flow Control
• PCI Local Bus Revision 2.2
• PCI Bus Power Management Interface Revision 1.1
• ACPI Revision 1.0
6
Functional Description
The IP100A LF is composed of various functional blocks as shown in Figure 1 on page 2. An overview of
the functions performed by each block are as follows:
6.1
Media Access Control
The MAC block implements the IEEE Ethernet 802.3 Media Access Control functions with 802.3 Full
Duplex and Flow Control enhancements. In half duplex mode, the MAC implements the CSMA/CD
algorithm. Full duplex mode by definition does not utilize CSMA/CD, allowing data to be transmitted on
demand. An optional flow control mechanism in full duplex mode is provided via the MAC Control PAUSE
function. Additionally, the MAC also performs the following functions in either half or full duplex mode:
• Optional transmit FCS generation
• Padding to the minimum legal frame size
• Preamble and SFD generation
• Preamble and SFD removal
• Receive frame FCS checking and optional FCS stripping
• Receive frame destination address matching
• Support for multicast and broadcast frame reception or rejection (via filtering)
• Selective InterFrame Gap to avoid capture effect
• MAC Loopback
The MAC is responsible for generation of hardware signals to update the internal statistics counters.
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