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What to do with unused GPIO pins?
I'm designing my own UC3A3 PCB and have a number of unused GPIO pins. I was planning on setting them as output (low) in software, to avoid any floating funny business, but I'm...
Thursday, 20 October 2011 - 18:46
PCB Trace Width Question
I'm working on a USB powered UC3 PCB, and I have a quick question about trace width, specifically for my power traces. I'm using the following calculator: http://...
Wednesday, 19 October 2011 - 13:22
USB Male A With UC3A3?
I'm laying out a PCB that has a USB Male A plug (the one that's on the end of your mouse/keyboard cable) and a UC3A3 chip. I'm using AVR32787 to help me lay everything out...
Monday, 17 October 2011 - 13:56
LED Question
I'm developing my first UC3 PCB, and I'm trying to figure out what the best options are for LED indicators. I currently have 3 states that I'd like to show, but more may become...
Tuesday, 11 October 2011 - 19:00
Picking an appropriate DC/DC Converter
I've begun designing a new board based on an AT32UC3A3, and I'm using the EVK1104 as my reference design. While I could blindly pick the same components, I'd like to at least try...
Friday, 7 October 2011 - 17:54
AVR32801 - UC3A3 Schematic Checklist Questions
I'm beginning the design of my first UC3A3 board, and I found AVR32801 - UC3A3 Schematic Checklist, which should be quite helpful. Except I'm comparing a few of their notes to my...
Friday, 7 October 2011 - 14:14
Difference Between void *ram & BYTE *buff?
I'm trying to link FatFS into an AVR32 project that's using some ASF code. ASF has numerous "void *ram" floating around, in particular I'm looking at sd_mmc_mci_mem.c,...
Tuesday, 4 October 2011 - 21:40
Inserting DFU Bootloader into Project?
I'm working on a USB enabled project with an EVK1104. It's a little faster (and easier) for me to flash new code to the EVK1104 via the DFU bootloader, but if I want to try and...
Monday, 3 October 2011 - 17:47
Do I need HMatrix for MCI <--> USB?
Simple question that I'm having trouble figuring out, do I need to enable the HMatrix to get fast transfer speeds between the MCI (SD Card) & USB? I'm going through the USB...
Monday, 3 October 2011 - 16:11
EVK1104 (AT32UC3A3256) DFU Bootloader
I recently purchased an EVK1104, but it did not come with the DFU bootloader installed, so I purchased an AVR Dragon. I've successfully programmed my board with the Dragon via...
Friday, 30 September 2011 - 18:09
FatFS using DMA on UC3A3?
Has anyone tried getting FatFS to support DMA on the UC3A3 chips? I'm trying to use FatFS to read a file from an SD Card, and then pass the result over USB to a host computer. I...
Monday, 26 September 2011 - 20:10
Confusion About EVK1104 SD MSC Demo
I'm trying to modify the EVK1104 SD MSC Demo, specifically to modify how it reads from the SD Card. I'd like the UC3A3 to actually mount the SD Card (FAT), and open an ISO file,...
Wednesday, 21 September 2011 - 22:13

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