All Questions
70
questions
0
votes
1
answer
52
views
Ohmic load on AVR's SCK?
I have an ATTINY13, and almost all pins are used (only PB2 is free).
What I need to add is a controllable ohmic load, which I believe best way to add is with an N-channel MOSFET, similarly with this ...
- 969
0
votes
0
answers
63
views
AT90USB1286 bricks after disabling clock divider
I have an AT90USB1286 which is connected to a 16MHz external crystal oscillator. It is my understanding that by default from the factory the CKDIV fuse is enabled which makes the chip run at an ...
- 15
1
vote
1
answer
51
views
Could an AVR ISP connector be reused to add SPI-Interfaced memories without programing the controller?
I have no previous experience designing AVR-Compatible hardware.
I have a board which uses an ATMega 2560 and has a SPI bus which is already used by a SD adapter. After some datasheet reading, I ...
- 183
0
votes
1
answer
113
views
How does the ATMega32 know that the incoming SPI data signals are the program to be burnt?
From my understanding, in order to burn a C program to the ATMega32's flash memory, the program is first compiled and converted into a hex file which is then uploaded using a computer program such as ...
1
vote
1
answer
145
views
Why does AVRDUDE require part ID as an input parameter when it detects the device signature by itself?
When I type the following in terminal
avrdude -p m32 -c usbasp
I get the following as output
...
- 335
1
vote
1
answer
297
views
Is the UPDI pin on AVR DA/AVR Tiny0/... 5V tolerant when VCC@3V3?
I've a project incorporating an AVR128DA28 which is used with 3V3 peripherals and should be programmed in circuit.
For this I built a jtag2updi (GitHub) adapter using an Arduino Nano.
Since ...
- 175
0
votes
1
answer
135
views
Pogo pin version of ISP cable for AVR mega8 in TQFP-32 package [closed]
There are a few 6pin and 10pin pogo variants of Atmel ISP adapters that require dedicated ISP pogo pads on the PCB.
There are full TQFP-32 ZIF sockets that can be used to program any AVR in that ...
- 135
0
votes
1
answer
652
views
Why 10-pin and 6-pin ISP?
I have another curiosity question:
Why is there a 10-pin AVR ISP connector and a 6-pin version?
It seems that the only difference is that the 10-pin version uses the extra pins for a heap more ground ...
- 447
1
vote
1
answer
378
views
Protecting a 3.3V board against a 5V programmer
I'm designing a home automation board with ATmega328. For programming it I'm exposing the appropriate pins via the AVR ISP interface. Now some ICs of the board allow only up to 3.5V power. What are ...
- 761
2
votes
2
answers
249
views
Getting started with AVR programming concepts
I am trying to get started with programming the AVR. I have chosen to use Atmega328P (which is in my Arduino Uno). When I did web search regarding the initial steps for learning the AVR programming, I ...
- 1,079
1
vote
1
answer
303
views
AVR ATtiny1634 - Programming Issue
I've have already used Arduino as ISP Programmer to load codes to Atmel chips like ATmega328p and ATmega8 quite a few times without any problem.
On my last project though, I decided to use an Atmel ...
- 35
0
votes
1
answer
175
views
AVR ISP not working, strange signal level [closed]
I can't read the chip ID of the ATMega16m1 MCU using a AVRISP mkII programmer.
The ISP pins are connected directly to the MCU, the reset line has a 10k pullup to Vcc (3.3V).
When measuring the ISP ...
- 141
1
vote
1
answer
129
views
Minimal external components for AVR CPU
If I want to program a new AT90USB1286 series chip via the standard 6 pin ISP header, do I need any additional components wired up at all? I'm wondering specifically about the need for a quartz ...
- 206
0
votes
1
answer
169
views
AVR programming
This question might be asked somewhere, if so all references would be appreciated.
Hello, I have programmed Atmel chip Atmega32U4 through USB. It is possible because it supports USB programming. I ...
- 23
5
votes
2
answers
651
views
Programming several AVRs with one ISP: which line to break?
Let's suppose that I have two AVRs connected to one ISP connector.
To programm only one MCU in this configuration I neet to break one (or mayby several) lines goes to the MCU I don't want to be ...
- 3,012