Knowledge Base Article

What is the frequency range of SDRAM output clocks in HPS?

Description

In the Cyclone V device handbook, Hard Processor System Technical Reference Manual, SDRAM PLL output clocks are notlisted in the Table 2-6. The maximum frequency of each clocks depend on the speed grade of the device and you can refer to the table below.

Clk name / device speed grade

C6

C7, I7

C8, A7

ddr_dqs_base_clk

up to 533 MHz

up to 533 MHz

up to 400 MHz

ddr_2x_dqs_base_clk

up to 1066 MHz

up to 1066 MHz

up to 800 MHz

ddr_dq_base_clk

up to 533 MHz

up to 533 MHz

up to 400 MHz

Resolution
The frequency range will be included in the future release of the Handbook.
Updated 2 months ago
Version 3.0
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