TMS320F28P650DK: Only 1.2V on the +5V-Enc of the IDDK v2.2.1

David Blanc

Part Number: TMS320F28P650DK
Other Parts Discussed in Thread: TMDXIDDK379D, C2000WARE

Hi,

I am using the IDDK v2.2.1 to be able to interface to an analog sin/cos encoder.

I followed the SPRUI54 application note, but I have only 1.2V on +5V-Enc pins (H4 pin #7 and H6 pin #7).

I have 5V on H2 pin #4.

Best regards,

David

0 Kevin Allen18 over 2 years ago

Hi David,

The 5V rails are different between H4/H6 and H2 headers. Have you reviewed the schematic and HW guides in the directory below already?

C:\ti\c2000\C2000Ware_MotorControl_SDK_5_00_00_00\solutions\tmdxiddk379d

Block M12 has a load switch that needs to be enabled for 5V0_ENC net.

Best,

Kevin

0 David Blanc over 2 years ago in reply to Kevin Allen18

I don't see nor R57 neither LD1 close to the M12 block on the IDDK PCB. Could you tell me where are they please?

+1 Kevin Allen18 over 2 years ago in reply to David Blanc

It's here on the board:

For 5V0_ENC to have power you need to make sure U4 power switch below is enabled.

Best,

Kevin

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