Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [avr32]

For questions specific to the Atmel AVR32 series of 32-bit microcontrollers.

The Atmel AVR32 is a 32-bit RISC microcontroller architecture available in several variants that include features such as fixed point DSP support, a peripheral DMA controller and a multi-layer bus. Detailed information may be found in the AVR32 Architecture Document.

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Unable to get bootloader working on custom PCB with AT32UC3L

I have designed a PCB for a client recently, everything is fine with the hardware and software (application is working as it is supposed to). Now we are facing the need to update the program inside the microcontroller, but since these PCBs are…
Alexandre Lavoie
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Can a wrong crystal oscilator capacitor burn the MCU?

Short story: I am using an Atmel AT32UC3C2512C MCU and I selected a 20MHz crystal oscillator for it and two NP0 10pF capacitors. I was in doubt between 10pF, 15pF or 22pF, so I decided to start with the smaller one. Can this burn a MCU? Long…
mFeinstein
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Correct SPI Configuration?

I'm still not entirely clear on TTL, so please, forgive my ignorance in this. I have a sensor and a microcontroller. The sensor is a BMI055 Gyroscope and accelerometer. The microcontroller is the Atmel AT32UC3C0512CAU-ALUT. With these two, I want…
user86234
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AVR32 Internal regulator

I am not pretending to use this, but as a general curiosity, when the AT32UC3C2512C datasheet says in page 1259, Table 40-20, parameter Iout, that the internal 3.3V regulator has a 35mA DC output current, does it mean I can actually use it as a…
mFeinstein
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How can I receive multiple bytes on SPI with CS being held low?

I have an FPGA which sends out a stream of bits over SPI communicating to 3 AD8403 daisy chained together. The FPGA keeps CS low, until 30 bits (2 address bits, 8 data bits x 3) have been transmitted, then brings CS high. The way the AD8403 are…
efox29
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AVR32 Drive Strength

The UC3C Datasheet doesn't provide a clear explanation about "drive strength", how it behaves and the side effects in projects. After fabricating my board I realized I placed a LED on a x1 strength pin (AVR32UC3C2512C pin PB00) and I calculate a…
mFeinstein
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I'm looking for the Windows-10 driver for the Atmel bootloader used in the Atmel UC3-A3 Xplained evaluation kit

I have a couple of Atmel boards called Atmel UC3-A3 Xplained evaluation kit, and am trying to use them in a project. I want to use the bootloader, which is apparently pre-installed on the AVR32 chip, to load code I develop in Atmel Studio running…
GeoffD
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Using internal pull-ups for TWI on AT32UC3B?

Does anyone know if it's possible to use the built-in pull-ups for TWI on the at32uc3b chips? I've been adding external pull-ups to my TWI circuits in the past because I couldn't find any concrete info about this. But if it's possible to just use…
Jeremiah Lusby
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What do I need to start with AVR UC3 Microcontrollers?

I am just beginning to learn how to use microcontrollers, and I have decided I am going to learn on the UC3B 32-bit avr. I will also be learning C programming in the process. What do I need in terms of programmers and other necessities, while…
Graf
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How to set up RS232 UART in Proteus?

I am having difficulties sending the correct message to the hyper terminal from ATmega32 micro controller. For some reason, the MAX232 chip is giving undesirable voltage levels. I want it to give ±15 volts at the outputs. (Pin 14 and Pin 15). Using…
Zipho Lunika
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AVR32 goes to unrecoverable exception when exiting interrupt routine

I'm using an ATUC128D3 microcontroller and have 5 switches connected to it. I have the GPIO interrupt configured to trigger on a falling edge and this works just fine. It enters the interrupt and the LED turns on, but upon completing the ISR, gets…
Alex Jegers
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Unexpected JTAG ID 0x0ffffffe (expected 0x0202603f)

I have problem with upload program Flash for my AT33UC3A3256 Atmel. that what comes up when im trying to read JTAG ID: Unable to enter programming mode. The read device ID does not match the selected device or any other supported devices. Please…
Chopin-san
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Options for debugging MCU that is freezing/crashing (AVR32)

I'm currently trying to figure out why it seems like the MCU is crashing/freezing. I can recreate the crash/freezing almost every-time by doing the same procedure, and I have been looking through the code extensively, trying to find what could be…
Linkyyy
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Can't program atmega32 interfaced with LM34

i want to read all temperature range of the LM34(-50 to +300) but i only can program single ended like this one, and i only can read from 0 to 50 F but i can't program one like this(can't read two pins and get the temperature from them), i can't…
Ahmed Rifaat
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How to configure an AVR32 as a USB CDC Device?

I am trying to configure an AVR32(UC3B0512) microcontroller so that it can appear as a Virtual COM Port to the PC. I followed the instructions in this application note, but could not get it working. I get the error : Unknown USB Device (Device…
fholly
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