krjdev

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  1. Hi, There is IMHO a wrong calculation of R316 (4.7k) and R317 (1k) from the over-voltage protection for the EFUSE (IC26). According to the reference manual manual of the Zybo-Z7, the maximal input voltage should be 5.7V. But that's not correct. The maximal input voltage is between 5.244V and 5.643V before the EFUSE cuts of the supply from the board. Please take a look in the datasheet from the EFUSE. The negative input from the internal comparator could be between 0.92V and 0.99V. With these two values and the current values of R316 and R317 (withou
  2. Hi, I have noticed an issue in a bare-metal application when polling the register XUARTPS_ISR (Channel Interrupt Status Register). No issues when I use XUART_SR (Channel Status Register) instead. The issue: When I poll XUART_ISR for TX_FULL and RX_EMPTY the UART interface becomes an unstable state. No sending and receiving after a few bytes is possible. Has somebody noticed the same issue or can somebody explain whats happening? Edit: My current code for the UART interface (Here I use XUARTPS_SR instead. But when I poll XUARTPS_ISR
  3. Hi @artvvb Okay, thanks. I have added these parameters. Now the "Connect board component" works. But I run into a new problem. I have created a unmanaged XDC (TCL) file for the IP. When I open the Top Level Design and execute the following TCL commands by hand, it works: synth_design source path/to/my_unmanaged_constraint.tcl opt_design place_design route_design write_bitstream But not in GUI. Vivado doesn't execute the file. I don't know how the set the properties from the file to get executed. Tried the following: Parameter: USED
  4. Hi @JColvin, No problem. The jumper setting on JP6 what I use is pin VU5V0 to pin WALL. I have tried to switch a rectifier diode serial in the supply voltage. Now the board works fine. The voltage drop after the diode has helped. According to your technical reference manual, the maximum voltage should be 5.7V. I have measured the supply voltage with two different instruments (multimeter and oscilloscope). Both of them display only max. 5.5V from the external power supply. Edit: Currently I have no laboratory power suppl
  5. Hello, I want create a custom IP for the Pmod interface. A simple GPIO Interface as example. But I run into a problem. I have downloaded the vivado-library from Digilent and placed the interface folder in my project. The Pmod Interface is available under Vivado. I added these port definitions in the top VHDL file of the AXI peripheral: pmod_pin0_i : in std_logic; pmod_pin0_o : out std_logic; pmod_pin0_t : out std_logic; pmod_pin1_i : in std_logic; pmod_pin1_o : out std_logic; pmod_pin1_t : out std_logic; pmod_pin2_
  6. Hi, I'm new in this forum. Have an issue with the ZYBO-Z7 when I use an external power supply. The board doesn't power-up very often when I turn on the power switch (SW4). eFuse? The open circuit voltage from the power supply is between 5.45V and 5.50V. When the board is powered over USB, everything works fine.