RocketIO™ Transceiver User Guide www.xilinx.com 19UG024 (v3.0) February 22, 2007Conventions RConventionsThis document uses the following conventions. An example illustrates each typographicaland online convention.Port and Attribute NamesInput and output ports of the RocketIO transceiver primitives are denoted in upper-caseletters. Attributes of the RocketIO transceiver are denoted in upper-case letters withunderscores. Trailing numbers in primitive names denote the byte width of the data path.These values are preset and not modifiable. When assumed to be the same frequency,RXUSRCLK and TXUSRCLK are referred to as USRCLK and can be used interchangeably.This also holds true for RXUSRCLK2, TXUSRCLK2, and USRCLK2.Comma DefinitionA comma is a “K-character” used by the transceiver to align the serial data on abyte/half-word boundary (depending on the protocol used), so that the serial data iscorrectly decoded into parallel data.TypographicalThe following typographical conventions are used in this document:Convention Meaning or Use ExampleCourier fontMessages, prompts, andprogram files that the systemdisplaysspeed grade: - 100Courier bold Literal commands that youenter in a syntactical statement ngdbuild design_nameHelvetica boldCommands that you selectfrom a menu File → OpenKeyboard shortcuts Ctrl+CItalic fontVariables in a syntaxstatement for which you mustsupply valuesngdbuild design_nameReferences to other manualsSee the Development SystemReference Guide for moreinformation.Emphasis in textIf a wire is drawn so that itoverlaps the pin of a symbol,the two nets are not connected.Square brackets [ ]An optional entry orparameter. However, in busspecifications, such asbus[7:0], they are required.ngdbuild [option_name]design_nameBraces { } A list of items from which youmust choose one or more lowpwr ={on|off}Product Not Recommended for New Designs
