TM4C129XNCZAD: Encryption chip speed, ULPI throughput and SD card readwrite speed

Fujimi Bentley

Prodigy 90 points

Part Number: TM4C129XNCZAD
Other Parts Discussed in Thread: AM5706

Hello TI!

From what I've gathered about the components offered by TI:

TUSB1002ARGET: Is a USB 3.0 interface chip

TM4C129XNCZAD: Is a high speed processing unit

SN74AVCA406L: Is a microSD card interfacing chip

The project we're working on is to develop a USB3.0 (target 800/480 Mbps read/write) encrypted, microSD card storage device. This brings up a few issues, but my understanding is that the USB3.0 interface chip (TUSB1002ARGET) can handle the dataspeed required, this can connect to the processing unit (TM4C129XNCZAD) via ULPI which can encrypt the data which is passed onto the microSDcard interface (SN74AVCA406L).

How fast is: SN74AVCA406L? Can it handle 800/480Mbps? Can the processing unit handle the desired encryption speed and is it capable of handling the format of the SD card files?

My main confusion when going through the documentation is the actual throughput of components...

Regards!

Fujimi

over 6 years ago

0 Bob Crosby over 6 years ago

TI__Guru 72500 points

Fujimi Bentley said:
Can the processing unit handle the desired encryption speed and is it capable of handling the format of the SD card files?

No, the USB interface on the TM4C129XNCZAD is limited to USB 2.0 high speed. I am not sure how you plan to interface to the microSD card, but the SSI clock (used for SPI or quad mode serial interface) is limited to 60MHz.

0 Fujimi Bentley over 6 years ago in reply to Bob Crosby

Prodigy 90 points

Thanks for the fast response Bob!

In that case, are there any chips capable of reaching the target speeds and have the desired throughput for encryption and read/write?

I thought the ULPI connection to TM4C129XNCZAD could be used to reach higher speeds instead of using it's own USB2.0 interface?

Thanks!

Fujimi

0 Bob Crosby over 6 years ago in reply to Fujimi Bentley

TI__Guru 72500 points

I will move this thread to another group, but i don't think we have a microcontroller that will keep up with USB 3.0 transfer speeds.

The TM4C129XNCZAD can only do full speed (12M baud) with the on-chip PHY. The ULPI interface and external PHY are needed for high speed 2.0. The device does not support the higher 3.0 speeds.

0 Fujimi Bentley over 6 years ago in reply to Bob Crosby

Prodigy 90 points

Hello!

I'm just bumping this for attention (I think the ticket system closed this ticket...?)

Regards!

Fujimi

0 Kevin Allen18 over 6 years ago in reply to Fujimi Bentley

TI__Mastermind 45126 points

Hi Fujimi,

Sorry for the delay.

I believe the AM5x, AM6x, and maybe some other Sitara processors have USB 3.0 support. I'd suggest looking into those devices. I've also moved this thread to the respective group to assist you further.

Best,
Kevin

0 Fujimi Bentley over 6 years ago in reply to Kevin Allen18

Prodigy 90 points

Hello!

Thanks for that! The AM5706 seems like exactly what I'm looking for.

Can I please get some details about how fast the crypto co-processor operates at? What is the maximum throughput it is capable of? Specifically whats types of AES (CTR, ECB, XTS?) and the MBps it can take.

Regards!

Fujimi

0 Bin Liu over 6 years ago in reply to Fujimi Bentley

TI__Guru**** 167971 points

Hi Fujimi,

You can find the performance numbers of the AM57x hw crypto accelerator in the link below. The numbers are captured in Linux using openssl command. The unit of the numbers is KBytes/sec.

software-dl.ti.com/.../Release_Specific_Performance_Guide.html

0 Fujimi Bentley over 6 years ago in reply to Bin Liu

Prodigy 90 points

Hello Bin Liu!

Thank you that is extremely helpful! May I keep this ticket open for a short while more incase I have any follow up questions?

Just a heads up, using a class10 SD card for testing performance would of throttle the SD card results found :$

Regards!

Fujimi

0 Bin Liu over 6 years ago in reply to Fujimi Bentley

TI__Guru**** 167971 points

Sure, this ticket will be open for a few weeks until it is locked automatically.
Even if it was locked you could still click the "Ask a related question" at the top-right of this page to fork a new ticket following up this one.

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TM4C129XNCZAD: Encryption chip speed, ULPI throughput and SD card readwrite speed