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Altera_Forum
Honored Contributor
Honored ContributorOutput enables on MAX7000s
I'm working with a MAX7128S device. Internally, I have an output enable driving some outputs as follows: assign PIN_13 = (!oe_n) ? ab : 1'bz;
assign PIN_15 = (!oe_n) ? ab : 1'bz;
assign ...
Altera_ForumHonored Contributor
Honored ContributorHi, I had a similar issue a while back and this is the response I received from altera:
"Thank you for using Altera mySupport. Regarding your query, please refer to Max 7000 device handbook and the Pin-out. If you would like to use global output enable, just connect the register OE to the OE input pin (OE1 and OE2 in pinout)." I asked some follow up questions and this is the second response: "Let me clarify my previous reply at below. [Q1]: My question is whether there is a way to do this without using logic in my code. The OE register you mentioned in your response has to be declared in my code like a standard register, right? And then used in my code to enable my output? [A1]: Yes, you are right. However, you can run simulation and analysis to confirm. Alternatively, you can actually consider to instantiate a tri - state buffer block. [Q2]: So basically, according to the last sentence, the OE input is of no special use in MAX 7000 devices if I am using Quartus? [A2]: Yes, the Fast Output Enable Register logic option is not available for MAX 7000 devices supported by the Quartus II software."
