Altera OCT Manual de usuario

Altera OCT Megafunction User Guide2013.11.29ug-altera_octSubscribeFeedbackAltera On-Chip Termination (Altera OCT) allows you to dynamically calibrate

This script generates a qii directory containing a project called ed_synth.qpf. You can open and compilethis project with the Quartus II software.Docu

Parameter SettingsThis section describes the Altera OCT megafunction parameter settings. You can parameterize themegafunction using the MegaWizard Plu

FeaturesThe following figure shows the top-level diagram of the Altera OCT megafunction.Figure 1: Altera OCT Megafunction Top-Level DiagramOCT Block O

Figure 2: OCT LogicI/O BlockOCT Logic BlockSerial toParallel ShiftLogicI/O Blockser_dataclk010enser[11:0]0 1ClockRRRRUSRMODES2PLOAD#serial_load_enS2PL

Figure 3: Altera OCT Tile-to-Tile ConnectionsOCT1ser_data*OCT2ser_data*OCT0ser_data*00011x00011x00011xSel[1]Sel[0]Sel[0]Sel[1]Sel[0]Sel[1]enserSel[1]E

InterfacesThe Altera OCT megafunction has two main interfaces:• An input interface directly connected from the FPGA RZQ pad.• Two 16-bit words output

Table 3: Termination Interface SignalsDescriptionDirectionSignal Name16 bit input port. Receives impedance calibration code foroutput termination. Sou

DetailsQSF AssignmentTo enable the series/parallel termination ports,include these assignments which will specify theseries and parallel termination v

Termination can exist on input and output buffers and sometimes simultaneously.There are two methods to associate pin groups with an OCT block:• Use a