TMS320F28377S: Interface with 32 bit SSI Encoder

Jero

Part Number: TMS320F28377S
Other Parts Discussed in Thread: TMS320F28388D,

Hi,

I would to know if I can interface TMS320F377S to Encoder with SSI Interface. The Interface can communicate 32 bits with a frequency from 100kHz to 2 MHz.

Thanks,

over 5 years ago

0 Nima Eskandari over 5 years ago

TI__Guru 52040 points

The encoder has an SSI communication protocol requirement? if yes, you want to use a device with SSI, for which I would recommend our new TMS320F28388D device with an additional ARM core and SSI peripheral.

0 Jero over 5 years ago in reply to Nima Eskandari

Prodigy 250 points

Hi,

thank you for your answer.

I would to know if I can use TMS320f28377s because I have re-usable code to apply.

Thank you

0 Jero over 5 years ago in reply to Nima Eskandari

Prodigy 250 points

Hi,

thank you for your answer, TMS320f28388dD has only 1 SSI Interface (Is it correct?). I need to interface with two 32 bit encoders: is there another device, more suitable?

I would to know if I can use TMS320f28377s because I have re-usable code to apply.

Thank you

0 Brett Larimore over 5 years ago in reply to Jero

TI__Guru 57255 points

Hi,

Please note that for an SSI encoder, you need not use an ARM-based SSI peripheral. These SSI encoders really just require a serial interface which is synchronous. For example, the C2000's SPI could be valid - and I know at least 1 or 2 instances where this has been done successfully. So it is possible this could be implemented on your F28377S.

I would however, recommend that you compare your SSI encoder to the SPI TRM specifications. One specific concern that had been mentioned in a prior thread may be Tm:
https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/635195

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The following thread may also be helpful:
https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/816389

Hopefully this helps.

Thank you,
Brett

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F28377S: Interface with 32 bit SSI Encoder