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Results tagged with atmega
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user 339043
ATmega is a family in the AVR series of Atmel microcontrollers. It is the main microcontroller of the Arduino prototyping platform. Please specify the specific part number in your question.
-2
votes
1
answer
90
views
Crystal oscillator input power
I have seen many circuits in which they have connected the crystal oscillator with two capacitors as a clock for the microcontroller like atmega 16A. …
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-1
votes
1
answer
136
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Crystal frequency for ATmega16A MCU
I am using a crystal of 16 MHz with an ATmega16A MCU.
As it is known that the crystals usually do not give us proper square wave and also the frequency is not that exact. So when I am enabling a 16 MH …
- 693
3
votes
4
answers
1k
views
Serial communication baud rate issue
I am a bit confused regarding the baud rate of serial communication.
Suppose I am sending a value of 198 to the receiver with a baud rate of 9600. At the receiver, the rate is also the same. Thus isn' …
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1
vote
1
answer
106
views
Setting external clock in ATmega16A
I am confused about how to configure an ATmega16A microcontroller to use an external clock instead of the internal one. I do not know whether I should set up the last bit as 0 or 1 for CKSEL in cryst …
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1
vote
Accepted
Setting external clock in ATmega16A
The last bit of the CKSEL is used to setup the rising time for the clock as shown below from the ATmega16A datasheet. This can be used in the combination with the SUT bits to set up the rising time ac …
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0
votes
3
answers
114
views
I2C VS SPI comunication
I have studied the I2C and SPI communication protocols, but one thing has been confusing for me. In the case of the SPI we have shift registers at both ends and with the help of the SPI rising clock e …
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2
votes
Accepted
ATmega328P bootloader
There is an error in the datasheet given in the link. The correct datasheet is given, which states that only ATmega48 does not support Read-While-Write. But the ATmega88A/88PA/168A/168PA/328/328P Supp …
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1
vote
1
answer
376
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AVR ATmega328P wrong fuses set
I was programming on the AVR ATmega328P using the USBasp programmer. I uploaded the blink example but the LED was not blinking. Thus I went on changing the fuse bits to the one Arduino has. During thi …
- 693
3
votes
Accepted
AVR ATmega328P wrong fuses set
So I found the solution and after that my chip started to work fine, all the fuse bits were back to normal. The technique used was high-voltage parallel programming. I used the Arduino to send signals …
- 693
2
votes
2
answers
233
views
ATmega328P bootloader
I have read the complete datasheet of the ATmega328P but have a few confusions regarding the chip. In the datasheet in a section I have found that there is no specific bootloader section and also the …
- 693