ALTDQ_DQS2 IP Core User Guide

ID 683742
Date 5/08/2017
Public
Document Table of Contents

Altera PLL Clock Settings Information

The following table lists the clock settings Information. You may merge the similar frequency counters in their design, or the Fitter performs the merging automatically.

Table 12.  Altera PLL Clock Settings InformationSelect Operation Mode: Normal in the Altera PLL parameters before configuring the following clocks.
Clock Description
outclk_0 400 MHz. Used as 2x frequency if necessary.
outclk_1 200 MHz. Used as strobe/dqs clock.
outclk_2 200 MHz. 270° phase shifted. Used as data/dq clock.
outclk_3 100 MHz. Used as half-rate clock.
outclk_4 200 MHz. Used to drive the ALTDLL IP core. The following are the ALTDLL minimum frequency:
  • Arria V devices: 200 MHZ
  • Arria V GZ: 300 MHz
outclk_5 200 MHz. Used to drive the full-rate core clock.
outclk_6 100 MHz. Used to drive the half-rate core clock.
outclk_7 25 MHz. Used as config_clk.
Note: lf the memory frequency is less than the ALTDLL IP core minimum frequency, then drive the ALTDLL IP core at 2x or 4x of the memory frequency. Relatively, the DQS phase settings decrease as well.