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STC in TMS570LC4357

Other Parts Discussed in Thread: TMS570LC4357

Hello team TI

I have the following doubts in SelfTest Controller of TMS570LC4357

What are the blocks PCR, Test Controller, STC_Bypass ATE Interface and the COMP BLOCK mean? What action does it perform? Also there is a ROM block, does this indicate STC ROM?

Thanks in advance!

  • The PCR shows up in the top level block diagram of the datasheet. It is just a crossbar switch that connects the CPU's external bus to things like peripherals. So reads & writes to the STC registers from the CPU will go through this path.

    The test controller is something that actually executes the test.

    STC_BypassATE don't worry about - ATE is our production tester.

    The output of the pattern is a 'misr' which is sort of like a CRC and if the logic is good it should match a known signature which is what the COMP block does.

    The STC ROM holds the actual patterns.. again you don't worry about this except to run a PBIST test on the ROM before using it to execute the STC test. You'll see that step in one of the device initialization application notes.