Chapter 1: Hardware Description

Each line of the QuadFALC framers can be configured independently in Line Termination mode (LT) or in Network Termination mode (NT). In the LT mode, the QuadFALC is in slave mode and synchronizes on the lines. In the NT mode, the QuadFALC is in master mode and synchronizes on a reference signal provided through connector P4 or on a free running internal frequency.

On the front access board, the framers 1 and 2 are tied respectively to J1 and J2 connectors. On the rear access board, the framers 1, 2, 3 and 4 are respectively tied to the lines 0, 1, 2 and 3 on P4 connector.

Additional details about the Infineon PEB22554 can be found at Infineon’s web site.

The Ethernet Transceiver

The Intel LXT971A is an IEEE compliant Fast Ethernet transceiver for 100-Base-TX and 10-Base-T applications. It is connected to the PowerQuicc II through a Media-Independent Interface (MII). It features :

10-Base-T and 100-Base-TX

Auto-Negotiation and Parallel Detection

MII interface with extended register capability

Robust baseline wander correction performance

Standard CSMA/CD or Full-Duplex operation

MDIO management interface

Its management interface is controlled by the PowerQuicc ports PC(25) (MDC) and PC(26) (MDIO).

The LXT971A controls its own interrupt line to the local processor (-IRQ3).

The LXT971A reset input is controlled by the PowerQUICC II CPM I/O port PC(24) (0=reset).

The LXT971A also includes three programmable LED drivers, which are used to control the LEDs on the faceplate.

Table 1-29. Ethernet LEDs

LXT971

OutputDescription

/('￿&)*￿ )DFHSODWH￿/('￿￿￿￿JUHHQ￿

/('￿&)*￿ )DFHSODWH￿/('￿￿￿￿JUHHQ￿

/('￿&)*￿ )DFHSODWH￿/('￿￿￿￿JUHHQ￿

4538 Hardware Reference Manual

33