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Intel
®
21143 PCI/CardBus 10/100Mb/s Ethernet LAN Controller
Design Guide 13
3.2.1 Internal Optional Daughtercard
Figure 6 shows a block diagram of a 100-Ready design using a daughter card.
3.2.2 Description of 100-Ready Daughtercard Block Diagram
The blocks in the10BASE-T 100-Ready block diagram represent the following components:
• 21143 — A 21143 with all of the external components for operating the network connection
(reference parts, XTAL, and so on). The 21143 can use the PCI bus, and the MII/SYM,
10BASE-T, and AUI coaxial ports for communication.
• Optional MII/SYM daughtercard — A daughtercard with a 100 Mb/s or 10/100 Mb/s PHY
that interfaces with an MII connector or custom connector. The daughtercard can be designed
to use the same RJ45 connector.
• RJ45 — A network connection.
Table 6. Internal vs. External Design Features
Design Features
Internal optional daughtercard
• Can be designed with an MII or any custom connector.
• User opens cabinet to install 100 Mb/s daughtercard.
External MII/SYM module
• User connects module to external MII/SYM connector; user does
not have to open cabinet for installation.
Figure 6. 10BASE-T 100-Ready Daughtercard Block Diagram
LJ-05189.AI4
PCI
Bus
Optional
AUI Coaxial
Transceivers
Optional
MII
Daughtercard
RJ45
Connector
AUI
Coaxial
Connector
MII
10BASE-T
21143