The parameter represents the design system clock frequency in Mega Hertz.
You can alter the design system clock frequency in VisualApplets, menu Design, menu item Change FPGA Clock.
Using higher frequency settings as 135 MHz may result in a timing violation.
In this case, reduce frequency.
The parameter PcieInterfaceType allows you to select the PCIe interface type and thus the supported DMA bandwidth.
Generation_2 (default) stands for the PCIe Generation 2 protocol and provides a bandwidth of 3,600,000 bytes/s.
Generation_1 stands for PCIe Generation 1 protocol and provides a bandwidth of 1,800,000 bytes/s.
Generation_1 designs utilize slightly less FPGA resources.
It is much easier to achieve timing closure for the applet with a Generation_1 design.
Generation_2 provides maximal performance, but makes it more challenging to achieve timing closure for the applet.
Multiple place and route synthesis runs will probably be necessary to meet the timing.
Availability
mE5 ironman VD8-PoCL, mE5 ironman VQ8-CXP6D, and mE5 ironman VQ8-CXP6B
GpioType
Type
dynamic write parameter
Default
OpenDrain
Range
{OpenDrain, PushPull}
This parameter allows the user to select the circuitry type for the external GPIO connector.
In PushPull mode, the GPIOs are driven directly.
Parameter only effects GPIO connector
This parameter has no effect on Front GPIO connector.
Only the GPIO connector is influenced by this parameter.
PcieInterfaceType (marathon and LightBridge platforms)
Type
static write parameter
Default
Generation_2
Range
{Generation_1, Generation_2}
The parameter PcieInterfaceType allows you to select the PCIe interface type and thus the supported DMA bandwidth.
Generation_1: The applet only supports PCIE generation 1.
Thus, the maximum DMA transmission bandwidth is ca. 900 MByte/s (1MByte = 1^10Byte).
The DmaToPC operator is limited so that LinkParallelism x LinkPixelWidth needs to be <= 64 bit.
Generation_2: The applet supports PCIE generation 2.
Thus, the maximum DMA transmission bandwidth is ca. 1800 MByte/s (1MByte = 1^10Byte).
The DmaToPC operator is limited so that LinkParallelism x LinkPixelWidth needs to be <= 128 bit.
The implementation of Generation_1 consumes less resources than the implementation of Generation_2.
The Generation_1 mode is helpful in designs that do not need the high bandwidth of Generation_2, but are short of resources.
This parameter is not displayed in the operator's parameter list.
However, the parameter is visible in the runtime.
BuildTimeStamp is an automatically generated identification number.
It's a 32-bit time stamp that can be read out of the applet during runtime for checking the consistency between the loaded
applet
and the loaded applet runtime environment.
This parameter is not displayed in the operator's parameter list.
However, the parameter is visible in the runtime.
32-bit hash over the entry in ProjectName (menu Design, menu item Properties).
This value can be read out of the applet during runtime for checking the consistency between the loaded applet
and the loaded applet runtime environment.
![[Note]](../common/images/admon/note.png)
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