8/19/2023 0 Comments 100 mhz clock mini zedAgain, this signal can be on the either the primary Clock pin or Clock2 or both. This can be derived from a signal generator, or from a basic clock module (which is no longer available) piggybacked on this module. There is an input from an external clock too. In addition, there is a slow clock signal, of around 600Khz which, can be on the either the primary Clock pin or Clock2 or both. Any of these speeds can be available on the primary Clock pin or the Clock2 pin. Due to the serial baud rate being derived from the clock speed, this will equate to a baud rate of 57600, 38400, 19200, 14400, 9600 or 4800. Optionally, this signal can be duplicated on the Clock2 pin of the Enhanced Bus, which can be used to clock a second UART port.Īs a multi speed clock there are several options for clock speed output. This is available on pin 21 of the Standard Bus which is used to run the CPU and UART. Primarily it generates a 7.3728Mhz clock signal to run the RC2014. This gives you access to the /CLK2 signals. If the Standard Bus option is chosen, then a 10 pin straight header is also supplied. It can be used with Standard Bus backplanes ( Backplane 5 or Backplane 8), or with Enhanced Bus backplanes ( Backplane Pro). the clock resources.This is the Dual Clock Module which is supplied with the RC2014 Pro, RC2014 Zed or RC2014 Zed Pro, although it can also be used as a replacement for the clock module supplied with the RC2014 Classic II, or if you are building your own custom RC2014 variant. If you do the latter, the tools should handle the clock constraints for the generated clock.Īnother thing you could consider - is to look at some of the Xilinx TRD (technical reference designs) which use the oscillators on the board for various functions - and see how they wire/reference/MMCM/PLL/etc. You can either change that clock's frequency w/ I2C commands *or*, use the clock wizard to instantiate an MMCM/PLL to convert that clock to the target frequency you care about. IIRC, there is at least one variable-frequency Si570 clock oscillator you can use - it has a default frequency when the board is powered on. You will want to read the ZCU102 reference manual and look at the clock generators it provides. The timing analysis constraint has no bearing on the actual runtime frequency of the oscillator connected to a pin. It looks like ACLK is a top-level port and you need to tell the tools which package/pin the ACLK is coming from. This only creates the constraint for the clock to be used during timing analysis. tcl file and add that file as a pre-hook for write_bitstream step for the implementation run. launch_runs Tcl command), add this command to a. NOTE: When using the Vivado Runs infrastructure (e.g. To allow bitstream creation with unspecified pin locations (not recommended), use this command: set_property SEVERITY. This design will fail to generate a bitstream unless all logical ports have a user specified site LOC constraint defined. To correct this violation, specify all pin locations. This may cause I/O contention or incompatibility with the board power or connectivity affecting performance, signal integrity or in extreme cases cause damage to the device or the components to which it is connected. Unconstrained Logical Port: 1 out of 17 logical ports have no user assigned specific location constraint (LOC). This resulted in an error like no user assigned specific location constraint (LOC): One thing I also tried (and failed to generate a bitstream) was to use tcl commands in the constraint file to generate the clock: create_clock -name ACLK -period 10
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