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RM48L952: CSP-tests for HET

user5256995
Intellectual 295 points
Part Number: RM48L952

Hi,

Our loopback compliance test for HET2 fails, while a similar test for HET1 passes. For most parts, our configuration of HET1 and HET2 are rather similar. However, HET1-pins used in the loopback test are default in PinMux. HET2 are not, and are instead placed under Mux Option 1. However, in our setup, the relevant pins (pin4 and 5) are enabled.

Could these differences somehow explain why HET1 loopback works, while HET2 fails? Is there some other possible explanations for this loopback test failing?   

  • 0
    TI__Guru**** 193086 points

    Are the pinmmr3 and pinmmr14 set correctly?

    pinMuxReg->PINMMR3 = PINMUX_BALL_K5_ETMDATA_23 | PINMUX_BALL_B3_HET1_22 | PINMUX_BALL_H3_HET2_4 | PINMUX_BALL_L5_ETMDATA_24;
    pinMuxReg->PINMMR14 = PINMUX_BALL_E18_HET1_08 | PINMUX_BALL_K19_HET1_28 | PINMUX_BALL_D17_EMIF_nWE | PINMUX_BALL_D16_HET2_5;

  • 0 in reply to QJ Wang
    Intellectual 295 points

    Thanks, that explains it. In our setup pimMuxReg->PINMMR3 does not have PINMUX_BALL_H3_HET2_4. Instead, it has PINMUX_BALL_H3_GIOA_6.

    But GIOA_6 is used elsewhere in our setup. So, how should we go about then to make the HET2 loopback test pass? Would it be ok to change the test itself slightly, and use other HET2 pins, for example 16 and 17?

    Regards

    /Avenir

  • 0 in reply to user5256995
    TI__Guru**** 193086 points

    Hi Avenir,

    have you solved your issue? If not, I will try the loopback test tomorrow. Thanks