All, I tried to post this in the Quartus II and Tools discussion but I have never received a response.
My Setup:
Quartus II 9.0
MAX-II PLD
Schematic entry
http://www.alteraforum.com/forum/showthread.php?t=53340
Also, now I have tied a few pins together. Such as: input pins 27,28,29,30 and output pins 108, 107, 106, 105 respectively. So pin 108 should follow pin 27...etc..... but..... it doesn't.
NO matter how I have programmed the input. TTL... CMOS... Schmitt... with pullups.... without pullups...... all 6-different ways.
I have tried several different pins and have tried 2 different PLDs.
I have tried putting latches on the inputs and clock them with a 30MHz clock to see if I can capture the pin input.... but ..... no avail.
Some of my other input pins seem to work, and I have tried to set up these pins exactly as the ones that work, but NO JOY.
For the most part the other functions of my design are working as expected, just this 4-bit address comparator to the CHIP_ID address section doesn't seem to be wanting to work.
The only way it works is if all 4-bit inputs are HI and or floating, so only address oxF (15) will work.
Am I not setting up my "Assignments" correctly or......
Thanks,
Keith
My Setup:
Quartus II 9.0
MAX-II PLD
Schematic entry
http://www.alteraforum.com/forum/showthread.php?t=53340
Also, now I have tied a few pins together. Such as: input pins 27,28,29,30 and output pins 108, 107, 106, 105 respectively. So pin 108 should follow pin 27...etc..... but..... it doesn't.
NO matter how I have programmed the input. TTL... CMOS... Schmitt... with pullups.... without pullups...... all 6-different ways.
I have tried several different pins and have tried 2 different PLDs.
I have tried putting latches on the inputs and clock them with a 30MHz clock to see if I can capture the pin input.... but ..... no avail.
Some of my other input pins seem to work, and I have tried to set up these pins exactly as the ones that work, but NO JOY.
For the most part the other functions of my design are working as expected, just this 4-bit address comparator to the CHIP_ID address section doesn't seem to be wanting to work.
The only way it works is if all 4-bit inputs are HI and or floating, so only address oxF (15) will work.
Am I not setting up my "Assignments" correctly or......
Thanks,
Keith