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Hi Timo,

I ran the test you recommended above. No power, check for shorts.

TTL1 pin has a short with the 1.8V track

- Ananya

Hi Timoteo,

I unplugged the SD card and turned the EMC2DP on. This I assume does not program the FPGA and run software on the Zynq.

I see the same behavior. TTL1 and TTL3 are at 1.8V. TTLVCC is at 1.8V. Other TTL pins pins i.e., TTL0, TTL2, TTLN, TTLP, and TTLGND are at 0V.



- Ananya

There is a typo in the above description.

The pins TTL1 and 3 are always driven high upon power on. I suspect U15 is faulty. Whats U15? Send me an email if you cannot disclose what U15 is here. I assume its some sort of clamper.
TTL0 and 2 seem to be fine.

Hi, What would happen if a 3.3V signal is applied to a TTL GPIO port (EMC2DP) configured to operate at 1.8V? Something is driving the TTL1-3 GPIO pins high (1.8V) immediately when I turn the board on. The pins stay high as long as the board is powered on. I want to rule out accidental exposure to a ...

Excellent information. Thanks!

I will get those 2-2.54 converter wires.

Note to myself: Never spend half-an-hour of precious life trying to force squeeze 2.54 mm crimps to 2 mm.

Hi,

What is the pitch of the connector for the LVTTL IO port?

General purpose jumper wires designed for 2.54 mm pitch dont hold onto the LVTTL port strongly.

Best regards,
Ananya

I got confirmation from Asbjorn that the TTL port pins match the GPIO cables I use. Also, he found that 1.8V is the only configuration that works. This means that I need to use a level shifter while talking to the microcontroller.

Hi, I need a single, low-speed, digital output pin on EMC2 to communicate with an external microcontroller. The interface to this pin should preferably be simple. Such pins are available on the Rasberry Pi or the Beaglebone Black for general purpose I/O. Is such a pin available on the EMC2? I was un...

Here is a basic SDSoC 2016.2 platform with Linux and bare-metal support for the Sundance EMC2DP: https://studntnu-my.sharepoint.com/personal/ananyam_ntnu_no/_layouts/15/guestaccess.aspx?docid=0e2de9d8a43d44f9da9c9c4286bfdbe48&authkey=AYx9VMusQFF8suQD6V5rIKU A HOWTO file inside describes how to r...

Hi Timoteo, Hope you are doing fine. Please share your experience in measuring power consumption of the EMC2 DP board. I would like to understand if there are methods to measure power consumption at a higher granularity than the wall-socket. For example, PS, PL, DRAM power. I was looking at power me...