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ADC voltage range on ATmega128RFA1?
I'm a bit confused by the datasheet. The datasheet says: "0-Vavdd ADC Input Voltage Range" "Selectable 1.5V, 1.6V or VAVDD ADC Reference Voltage" And then throughout the datasheet...
Tuesday, 29 March 2011 - 23:00
ATmega128RFA1 wireless bootloader?
How do I get the ATmega128RFA1 to wirelessly bootload - entirely hands off? I got it to reset wirelessly by turning on the WDT. And I got it to bootload in a wired manner using...
Saturday, 22 January 2011 - 23:35
ATmega128RFA1 state transition detection issue
With the exception of the wireless transceiver, I have my ATmega128RFA1 fully programmed. This transceiver thing is all new to me, and I'm struggling to program it through the...
Sunday, 12 September 2010 - 15:22
ATmega128RFA1 crystal and fuse problem
I wired up an ATmega128RFA1 according to the application circuit in the datasheet (page 493). Everything worked fine until I set the SUT_CKSEL fuse to: Tranceiver Oscillator:...
Monday, 12 July 2010 - 16:26
digital ground AND analog ground?
My ATmega128RFA1 has both AVSS and DVSS. I've just finished reading this to explain the difference: http://www.epanorama.net/wwwboar... So are AVSS and DVSS connected internally...
Thursday, 4 March 2010 - 08:14
What pins for TWI on AT91SAM7S?
I'm confused which pins to use for TWI (I2C) on the AT91SAM7S. The datasheet diagram on page 314, 30.2 and 30.4, say TWCK is for clock, and TWD is for data. However on the pinout...
Saturday, 13 February 2010 - 05:20
where to connect VBUS for USB of AT91SAM7S?
I'm trying to figure out which pin the VBUS on the USB connector should connect to on the AT91SAM7S. Looking up the schematics of the various development boards hasn't helped. The...
Saturday, 13 February 2010 - 05:02
AT91SAM7S128 and USB crystal frequency
I am confused on which crystal to use. The AT91SAM7S128 can go a max of 55MHz, and for my app, higher the better. However, the manual is confusing me about what I'm limited to...
Sunday, 10 January 2010 - 10:41
4.16 (build 628) unable to write to boot section
chip: ATmega640 using 4.16 (build 628) I am unable to write to the boot section using this AVR Studio version. The chip is blank when reading the chip after programming. When...
Friday, 1 May 2009 - 00:10
storing multiple large arrays into EEPROM
I want to store several large arrays into EEPROM. What is the line of code to do this? All I can find is this: eeprom_write_byte ((uint8_t*)<<location>>, <<byte to be...
Wednesday, 1 April 2009 - 05:36
Digital Compass affected by ground plane?
I'm designing a circuit that involves a digital compass and I'm worried about effects from a ground plane directly under it. The digital compass can pick up Earth's weak magnetic...
Sunday, 1 February 2009 - 11:42
ATmega8 at 3.0V can use 8MHz internal oscillator?
I have an ATmega8 that I want to run at 3.0V (but 3.3V is ok). I don't want an external oscillator, only internal oscillator, and I want it running at either 7.3728 MHz or 8MHz. I...
Wednesday, 28 January 2009 - 10:12

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