Altera Interlaken MegaCore Function Bedienungsanleitung PDF herunterladen (Seite 74)

B–2 Appendix B: Excluding Transceivers for Faster Simulation

External Transceiver Interface Clocks

Interlaken MegaCore Function June 2012 Altera Corporation

User Guide

Figure B–1 illustrates how the external transceiver interface is derived from the full

Interlaken MegaCore function.

This appendix describes the external transceiver interface.

External Transceiver Interface Clocks

If you turn on Exclude transceivers, your Interlaken MegaCore function exposes the

interface to the transceivers. With this parameter setting, the Interlaken MegaCore

function has the following external transceiver interface input clocks:

■

rx_lane_clkN_export[M:0]

—these (N × M) input clocks each clock a distinct

Interlaken receive lane. The Interlaken MegaCore function derives an RX PCS

block clock from these input clocks.

The grouping of these clocks indicated by the use of N and M is based on the

connections to transceivers when they are included: N is the number of transceiver

blocks required for this variation (minus 1), and M is the number of lanes per

transceiver block (minus 1). For the 10-lane and 20-lane variations, M is five. For

the remaining variations, M is four. For an illustration of this numbering scheme,

refer to “Clock Diagrams for the Interlaken MegaCore Function” on page 4–6.

■

tx_lane_c_clk

—clocks the TX PCS block and the Interlaken transmit lanes.

Figure B–1. Interlaken MegaCore Function Block Diagram Showing the External Transceiver Interface

Interlaken MegaCore Function

Application

Interface

Transceiver Blocks

PCS

MAC

PCS

MAC

TX Out-of-Band

Flow Control

RX Out-of-Band

Flow Control

Calendar

and

Status

Filter

and

Buffer

Filter

and

Buffer

Packet

Regroup

Individual

Reset Signals

Packet

Regroup

Arbiter

Channel 0

Channel 1

Channel 0

Channel 1

Calendar and

lane, link status

OOB FC Block

Interlaken

Link

External

Transceiver

Interface

Out-of-Band

Flow Control

Interface

1 2 ... 69 70 71 72 73 74 75 76 77 78 79 ... 89 90

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