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I/O states pre-POR
I'm using the ATtiny416.  POR kicks in somewhere between 1.4 and 1.8 volts as long as Vdd is rising slowly enough.  But I've got some FETs on the board that can turn on...
Monday, 22 June 2020 - 14:36
SNAP with Atmel Studio
I downloaded AS earlier this month, version 7.0.2397.  Today I received my SNAP, removed R48 and added a 10K pullup to the UPDI signal.  AS doesn't recognize the SNAP....
Tuesday, 24 March 2020 - 20:34
ATtiny416 RTC clock
The datasheet says:   23.2.3.1 "System clock (CLK_PER) is required to be at least four times faster than RTC clock (CLK_RTC) for reading counter value, and this is regardless...
Monday, 24 February 2020 - 14:36
Configuration Change Protection (CCP)
Is this how to write to protected I/O registers?  Is it ok to write to the CCP register again before the 4 clock cycles have elapsed?   Main: ldi    ...
Saturday, 22 February 2020 - 21:21
Assembly code for ATtiny416
It's been a few years since I've designed a project using an AVR.  Back then I had Studio 6.  I've got Studio 7 now, and it seems a lot more complicated.  I notice...
Thursday, 20 February 2020 - 22:50
PORTB pin change and INT0 interrupts on ATtiny87
Can I enable both INT0 and PORTB pin change interrupts on an ATtiny87?  My pin change interrupt is working, but not the INT0.  The only enabled pin change interrupt is...
Saturday, 22 August 2015 - 00:59
Can't re-enter ISP after I programmed the debugWire fuse
The AVR Dragon documentation says:   NOTE: When the DWEN fuse is enabled the SPI interface is overridden internally in order for the OCD module to have control over the RESET...
Friday, 24 April 2015 - 19:17
.h files?
It's been a few years since I've used an AVR.  I'm using the ATtiny87.  Does Atmel have header files for each device with peripheral register equates, or do I have to...
Monday, 16 March 2015 - 23:11