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AVR Speed grades
I am looking at the data sheet for the mega645. On the section about speed grades it talks about the Maximum Frequency. Does this maximum frequency refer to crystal oscillator or...
Wednesday, 4 February 2015 - 12:32
using PORTF.7 as an output is causing a reset
Hi I have a circuit with a MEGA645 and I am trying to use portF.7 as an output to drive an LED. This works fine when I don't enable interrupts. But as soon as I enable the master...
Tuesday, 12 March 2013 - 19:47
xmodem-1k and HyperTerminal
Hi I have written a boot loader that use xmodem 1k to load a new hex file. I have discovered that HyperTerminal appears to add an extra 0xFF when sending the CRC if the CRC...
Wednesday, 1 June 2011 - 22:38
tiny2313 USART SPI master clock does not stop
I am having a problem with the SPI clock when using the USART SPI module on the tiny2313 chip. /* enable the rx and tx and data transmit complete interupt */ UCSRB |= (1...
Sunday, 9 May 2010 - 20:15
connecting 2 AVRs using SPI and still have ISP capabilities
I want to connect 2 AVRs via SPI but still maintain the ability to use ISP on each one using the 6 pin header. Is there a standard configuration for this? Maybe there is a better...
Monday, 5 April 2010 - 08:12