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PWM generation from XMEGA
Hi, I need to generate a pair of complementary PWM signal (1 - 8Mhz) from XMega A4 to drive an h-bridge. Can it be done at all? I know PWM can be easily generated from Xmega, but...
Thursday, 26 May 2011 - 20:50
I2C and timer interrupt mixed up
Hi, I am using I2C (master mode) to interface sensors. What I would like to do is to read from I2C periodically through timer interrupt. I notice that I2C driver code uses...
Thursday, 17 March 2011 - 17:57
Atmega 168 internal clock setting
Hi, I set my atmeag168 to "Int. RC Osc. 128kHz; Start-up time PWRDWN/RESET: 6 CK/14 CK + 65 ms". After that, my AVRISP MKII could not talk to it at all, even I set the ISP...
Monday, 28 February 2011 - 18:25
USI as I2C in Attiny85 or any TINY example code?
I am trying to use Attiny85 as I2C master. I downloaded the code from Atmel application notes but it didn't work. Looks like the code from the application notes is outdated for...
Thursday, 13 January 2011 - 20:02
XMEGA D4 problem, TWIE not defined as specified
Hi, I order some cheaper alternative of A4 called D4. It says in the D4 spec sheet Section 19 that there are 2 TWI inteface, one is TWIC and another TWIE. However, TWIE is not...
Tuesday, 21 December 2010 - 22:55
AT90USB128 eagle file?
Does any one have the eagle files? Or where to find them? Thanks
Tuesday, 16 November 2010 - 22:50
Xmega A3 vs D3
Hi, I have a board made for a XMEGA A3 chip, now I see that there is D3 chip which is pin compatible with A3 and I don't use any functions that only exist in A3 (like crypto...
Tuesday, 16 November 2010 - 15:10
xmega LED current limit
Hi I am trying to drive about 10 LEDs from a XMEGA A4 chip, two on PORTB, 4 on PORTC and PORTD. Each LED needs about 20mA. Does this exceed the current limit of XMEGA A4? Also...
Monday, 15 November 2010 - 15:27
xmega SDRAM interface
Hi, I am trying to build a board with XMEGA A1 and SDRAM for the first time. I have tried Xplain evaluation kit and I am trying to duplicate the exact schematic for the SDRAM part...
Monday, 15 November 2010 - 05:11
reduce noise in motor control boards
I have a motor control board based on xmega a3. It is not used to drive four small low voltage toy (Tamiya) motors, which you can find a lot in hobby shops. I use two TB6612FNG...
Friday, 12 November 2010 - 14:50
xplain external sdram
I have an xplain kit. It has 8MB external SDRAM. However, when I compile my code in AVR studio, how do I tell the compiler there is external SDRAM and how much so it can use that...
Friday, 12 November 2010 - 14:33
USB-to-UART Bridge to massive storage
Hi, I want to use a chip that does USB-to-UART Bridge (CP2102). So one end connects to usb and the other connects to uart. I also have a SPI based micro-sd connector. How can I...
Thursday, 11 November 2010 - 20:49

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