Author Topic: custom carrier board for TE0803 does not boot from SD Card  (Read 62 times)

Julian

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Hello,
i built a custom carrier board for the TE0803. Problem is, that I can't boot from the SD card. Nothing happens at all. The same SD card in the TE0808 carrier works.
Access over JTAG is working fine on my board. See the configuration on my carrier board below. Have I forgotten to set a specific config pin? Any ideas?
Thanks in advance
Julian

PL_DCIN, DCDCIN = 3.8V
LP_DCDC = 3.3V

SD0: with level shifter 1V8 <-> 3V3
MIO13: DAT0
MIO14: DAT1
MIO15: DAT2
MIO16: DAT3
MIO21:CMD
MIO22:CLK
MIO[17:20], MIO[23:25] not connected


configuration pins:

pulled up to 3V8 (4k7):
J2-82   (PG_PSGT)
J2-104   (PG_PL)
J2-91   (PG_GT_R)
J2-97   (PG_VCU_1V0)

tied to 3V8:
J2-84   (EN_PSGT)
J2-102   (EN_FPD)
J2-108   (EN_LPD)
J2-112   (EN_DDR)
J2-95   (EN_GT_R)
J2-101   (EN_PL)

J2-83   (MR) has button to GND

Bootmode:

MODE[2,3] = GND
MODE[0,1] = 1V8

JH

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Re: custom carrier board for TE0803 does not boot from SD Card
« Reply #1 on: May 16, 2019, 11:13:03 PM »
Hello,
which type of level shifter did you use? one which is specified for SD?

Can you send the B2B part and SD connection of your schematics to support@trenz-electronic.de ? It's much easier to help if I can see the schematics.

br
John