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CHess4
Beginner
415 Views

Getting started resources for MAX 7000

Hi,

I am starting to develop with CPLDs, and​ when looking for basic MAX 7000 circuits, I don't find anything on the net. Is there a sample basic circuit for integrating a MAX 7000A into a schematic? Showing which connections have to be made for it to work? Or is there a schematics of a simple development board that I could copy from? I am using it in combinatorial mode without clock, with 3V3 inputs, and I would like to program it in-circuit using an ARM microcontroller that is part of the same circuit or external JTAG programmer connected via pin header. I am using altium 16.

I will be using the 7032 or 7064 version with PLCC 1.27MM pitch package, as I am soldering the prototypes myself. Any link to beginners resources will be greatly appreciated. Especially to circuit design for integrating those CPLDs.

Thanks and best regards,

Chris (Germany)​

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6 Replies
ak6dn
Valued Contributor II
17 Views

AnandRaj_S_Intel
Employee
17 Views

Hi chris,

 

Unfortunately, we not have any MAX 7000 dev kits anymore.

We can find datasheets and pin-out tables from below link.

https://www.intel.com/content/www/us/en/programmable/support/literature/lit-m7k.html

You can find other CPLD kit information from below link

https://www.intel.com/content/www/us/en/programmable/products/boards_and_kits/all-development-kits.h...

 

Regards

Anand

CHess4
Beginner
17 Views

Hi, thank you, there are no schematics in that document. Where can I find sample schematics with power supply and in circuit programmability, ideally by a microcontroller?
ak6dn
Valued Contributor II
17 Views

Well the datasheet has all the info you need. It lists the VCC and GND pins and the VCC power supply requirements (ie, 3.3V +/- 10%). Programming is via JTAG pins TCK, TMS, TDI, TDO which would connect to GPIO pins on a microcontroller and/or a connector for use with an Altera ByteBlaster programming adapter. All the other I/Os are 5V tolerant and connect to whatever devices you want. I don't know what else a schematic could show you?

CHess4
Beginner
17 Views

Then I guess it is easier than I thought… I am integrating it into a PCB without being able to test it on a breadboard first. Still, it is redundant to the 74xx logic I have on the board already, so it is not a catastrophy if it doesn’t work in the next PCB version. If I’m using it for combinatorial mode, I don’t need an oscillator, right, and apart from the decoupling caps (0.1µF) I just need standard protection for IO and take care about fanout and current limits I guess. Is there a way to have 5V output with 7000A? I am using 3V3 mostly but have WS2812b LEDs that need 5V for data. Until now I’m using a level shifter (74LS245). Do I need to connect JTAG to an UART / SPI / I2C port of my µC (STM32) or will any GPIO ports do? Thanks for your help
ak6dn
Valued Contributor II
17 Views

If you are not using any clocked FFs then you don't need a clock source and can operate purely combinatorial logic.

For sure you need to understand the max current drive limits for the I/Os. Datasheet will tell you the limits.

 

The 7000A series is 3.3V supply and I/O voltage, but the I/Os are 5V tolerant. So you can add a pullup to +5V tied to an output if need be.

 

JTAG is its own protocol (NOT the same as UART/SPI/I2C). So unless you have a JTAG knowledgeable master (like an Altera ByteBlaster) you will have to connect the JTAG pins to standard I/O ports on your micro, and then write the code that simulates the JTAG protocol. Be aware however that writing the code on a micro that does low level JTAG (ie, bit banging TCK/TMS/TDI/TDO correctly) is just a very small part of the problem. Writing all the code that implements full device programming thru JTAG is a whole other significant project. Old Altera used to supply source code for such a function (the old JAM STAPL player) but I don't know if that is still around now that Intel has assumed control.

 

Personally I would recommend getting an Altera USB Blaster clone (Terasic has a nice one that is 100% Altera compatible that is inexpensive).