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Discussion Title Created date
Multiplexing Peripheral & GPIO
I'm trying to implement the workaround for an errata in Rev D of the UC3A3 MCU that requires me to multiplex a peripheral (MCI) and GPIO line. I'm not really sure the best way to...
Friday, 1 June 2012 - 14:05
Problem Flashing UC3A364 w/ dfu-programmer and batchisp
I've got a bunch of UC3A364 devices that I'm having trouble flashing with either dfu-programmer 0.5.4 (Linux) or batchisp 1.2.5 (Windows 7). According to batchisp, I'm flashing...
Tuesday, 29 May 2012 - 16:00
Mass DFU Programming
I'm almost ready to start mass producing one of my projects. I'm expecting to order about 500 units at a time, though more isn't out of the question. I've decided the fastest...
Monday, 5 March 2012 - 19:32
UC3A3 on a USB 3.0 Port?
Out of curiosity, has anyone tried using a UC3A3 on a USB 3.0 port? I've got one USB 3.0 port on my laptop, and when I plug in my board, the USB port just suspends. USB 3.0 is...
Friday, 2 March 2012 - 19:33
Problem with DFU Bootloader
I've got a problem with my DFU bootloader on a UC3A3256. It works fine, until I try to erase the chip. When I try that, either with batchisp (on Windows) or dfu-programmer (on...
Wednesday, 1 February 2012 - 19:08
Determining Code Size/Flash Used
I've been working with my EVK1104 on a project, but now I'm developing my own custom board. I'm fairly certain I'm not using nearly the whole 256K of flash memory, but I'd like...
Monday, 30 January 2012 - 20:38
Pullup Resistors for SD/MMC Card with MCI
I've got a UC3A3 project that's using the SD Card. I've followed AVR32801 (http://www.atmel.com/dyn/resourc...) and put 68 kOhm pullup resistors on the CMD/DAT lines. Going back...
Monday, 23 January 2012 - 19:36
"Cheating" number of bypass caps?
I'm working on shrinking a UC3A3 project, and one thing I noticed is I have a lot of bypass caps. I understand why they're there (equal parts engineering and black magic :)), but...
Thursday, 19 January 2012 - 21:37
Question About DFN6 Footprint
I'm working on an AT32UC3A3 project that requires getting from 5V to 3.3V. I was using a TI LDO, but it's physically too big for the next revision. I've found this chip, which...
Wednesday, 18 January 2012 - 19:15
Bidirectional Optoisolator?
Quick feasibility question. I have a circuit that has a single signal line, held at 3V. Signalling is done by dropping the line to ground for a particular length of time. I'd...
Thursday, 5 January 2012 - 23:49
Problems with VBIAS on UC3A3
I've got a UC3A3 on a custom PCB, and it was working pretty reliably, but I've recently started having problems where the device is not recognized by my computer. Here's a quick...
Friday, 9 December 2011 - 18:25
Generating/Parsing Configuration Files
I'm trying to add a configuration file to one of my projects. Ideally, it will be human readable and machine readable. At the moment I've only got a handful of variables, but I'...
Friday, 9 December 2011 - 17:14

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