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I need to correct my statement.
1. My intention is to have simple test to microcontrollers (not specific one). For ex. Idd/power consumption, flash operation.
2. Some MCUs are not desgined with JTAG interface for test but they have similar serial interfaces (may be some specific protocols) that I have to deal with. Each one might be different.
3. As a result, I plan to use FPGA to generate patterns to access the chips. The patterns that I need to geneate would around be 2-10 pins. And there will be up to 10~30 types of patterns for each pin to enter test mode and setup control signals.
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For that you will need an ADC and analog power sensing circuits.
There's nothing wrong with using an FPGA for this, but I would personally implement this type of logic using a microcontroller. It sounds mostly like bit banging.
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As a result, I need to make up my mind:
1. Which FPGA/CPLD would be suitable for me
2. How to generate patterns, simply through shift registers and input patterns from my laptop?
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Any FPGA or CPLD is suitable. An FPGA has the advantage of having on-chip memory that can be used for the logic analyzer, and have more logic elements, but they need a boot device, since they are SRAM based. Before selecting an FPGA, you need to determine what your analog sensor requirements are.
Cheers,
Dave
Honored Contributor
