DDR (Double Data Rate) memory interfaces use SSTL signaling which requires parallel termination to VTT at the receiver side. The external VTT termination on data is for the memory controller side during the read operations. Since the address, command ...
LatticeECP3 devices have one DQSDLL per side. DQSDLL has an input port called UDDCNTLN that allows its DLL code value (DQSDEL output) to be updated while it is asserted Low. The updated code value is used to generate precise PVT (Process Voltage ...
There are several possible reasons when the read data valid signal is not asserted at all during the read operation: The read data valid signal is generated from the incoming DQS signal that is driven by a DDR2 memory device or memory module (except ...
Lattice Technical Support Expectation Please be advised that highest priority for Lattice Technical Support will be given to 1. Software which is not working as expected or suspected bugs. We recommend that customers use the latest software tools and ...
Lattice currently recommends the following for implementing Gigabit Ethernet interfaces: CertusPro-NX FPGAs: Use SERDES-based SGMII or RGMII Certus-NX, MachXO5-NX, and CrossLink-NX: Use RGMII These recommendations are based on updated LVDS-based ...
Glitch Fliter is used to prevent short-duration events of glitches, This is used to prevent False tripping on noise in a system. GLITCHFilter in device constraints , enables 1ns glitch filtering.
Description: Nexus device family has a default I2C slave address of 0x40 and you are allow to modify it based on your requirement. Solution: To permanently modify the I2C address, you can modify the desired value in .fea file and use the Programmer ...
Description: To understand the RTL formatting of the PCIe configuration space in the Nexus' PCIe demos, please refer to the following details. Figure 1 illustrates the initialization of the PCIe configuration space in the Nexus' demo.