Altera Stratix IV GX FPGA Development Board Bedienungsanleitung PDF herunterladen (Seite 53)

Chapter 2: Board Components 2–45

Components and Interfaces

August 2012 Altera Corporation Stratix IV GX FPGA Development Board

Reference Manual

SDI Video Input/Output

The SDI video port consists of a LMH0302SQ cable driver and a LMH0344 receiver

cable equalizer. The PHY devices from National Semiconductor interface to

single-ended 75-Ω SMB connectors and extends out through the PCI Express bracket

for easy use while installed in a host PC.

The LMH0302SQ driver supports operation at 270 Mbit standard definition (SD),

1.5 Gbit high definition (HD), and 3.0 Gbit dual-link HD modes. Control signals for

SD and HD modes selections, as well as device enable can be set. The device can be

clocked by the 148.5 MHz voltage-controlled crystal oscillator (VCXO) and matched

to incoming signals within 50 ppm using the UP and DN voltage control lines to the

VCXO.

Table 2–42 lists the supported output standards for the SD and HD input.

Table 2–43 lists the SDI video output interface pin assignments. The signal names and

directions are relative to the Stratix IV GX FPGA.

Table 2–42. Supported Output Standards for SD and HD Input

SD_HD Input Supported Output Standards Rise TIme

0 SMPTE 424M, SMPTE 292M Faster

1 SMPTE 259M Slower

Table 2–43. SDI Video Output Interface Pin Assignments, Schematic Signal Names, and Functions

Board

Reference

Description

Schematic

Signal Name

I/O Standard

Stratix IV GX Device

Pin Number

U4.1 SDI video output P

SDI_TX_P

1.4-V PCML

U4.2 SDI video output N

SDI_TX_N

U4.6 Device enable

SDI_TX_EN

2.5-V

U4.10 High definition select

SDI_TX_SD_HDn

V29

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Altera Stratix IV GX FPGA Development Board Bedienungsanleitung Seite 53