![]() I've been banging my head against the wall trying to find out what it is exactly, but having little success. ![]() Reading through the web, this issue appears to be a singular issues but with many different possibilities (wrong drivers, bad hardware, etc). I've been able to determine that it' something on my NT Kernel and System file via the Task Manager. The IP's Avalon® memory-mapped interface shares the same clock source as the transceiver management clock.I'm sorry to revive a dead thread (and then hijack it at that), but i thought I might want to as i'm dealing with somewhat of the same issue that this thread has.Įvery minute on the minute, my CPU will spike for about 1-2 seconds as something runs in the background. The table below shows an example where the device_clk in this design is an input into the transceiver refclk pin. However, if your design requires you to connect the rx_avs_clk and reconfig_clk to the same clock, you need to put them in the same clock group. Example A Original clock names in altera_jesd204.sdcĬreate_clock -name xcvr_tx_rx_refclk -period 4.0 Ĭreate_clock -name device_clk -period 8.0 Ĭreate_clock -name jesd204_avs_clk -period 10.0 Ĭreate_clock -name phy_mgmt_clk -period 13.3 The IP and transceiver Avalon® memory-mapped interfaces have separate external clock sources with different frequencies. The device_clk is the input to the core PLL clkin pin. In this example, there is a dedicated input clock for the transceiver TX PLL and CDR at the refclk pin. The table below shows an example of clock names in the altera_jesd204.sdc and input clock names in the user design. Be careful when adding the timing exceptions based on your design, for example, when the JESD204B IP handles asynchronous timing between the txlink_clk, rxlink_clk, pll_ref_clk, tx_avs_clk, rx_avs_clk, and reconfig_clk (for Intel® Arria® 10, Intel® Cyclone® 10 GX, and Intel® Stratix® 10 devices only) clocks. sdc file to the full-design clock names, taking into account both the IP instance name in the full design, and the design hierarchy. Describe the relationship between base and generated clocks in the design using the set_clock_groups command.Īfter you complete your design, you must modify the clock names in your. ![]() Identify the base and generated clock name that correlates to the txlink_clk, reconfig_clk, and tx_avs_clk, rxlink_clk, and rx_avs_clk clocks using the report_clock command.Comment out the create_clock commands for the txlink_clk, reconfig_to_xcvr or reconfig_clk, and tx_avs_clk, rxlink_clk, and rx_avs_clk clocks in the altera_jesd204.sdc file.You need not add the derive_pll_clocks command into your top level SDC file." For Intel® Stratix® 10 devices, Intel® FPGA IOPLL IP core has SDC file which derives the PLL clocks based on your PLL configurations.Derive the PLL generated output clocks from the PLL Intel® FPGA IP (for Arria V, Cyclone V and Stratix V) or IOPLL Intel® FPGA IP (for Intel® Arria® 10 and Intel® Cyclone® 10 GX) using the derive_pll_clocks command.Specify the PLL clock reference pin frequency using the create_clock command.sdc file for your project, make the following command changes: In a functional system design, these clocks (except for reconfig_to_xcvr clock) are typically provided by the core PLL. reconfig_clk (for Intel® Arria® 10, Intel® Cyclone® 10 GX, and Intel® Stratix® 10 devices only). ![]()
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