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SREG C Bit on MUL (unsigned) instruction
I just copy'ed the text in AVR studio 7  
Tuesday, 16 April 2019 - 20:05
SREG C Bit on MUL (unsigned) instruction
The GCC compiler has a flag to mark if the top and buttom should be mapped around on chips bigger than 8K.(-mshort -calls ) 
Tuesday, 16 April 2019 - 18:43
Why no 14 pin AVRs with PLL?
Ask microchip. If you order 10 mill+ 20 pin chips in a 14 pin house perhaps they will do it. :)   I quick answer no big customers have asked for it.   ...
Sunday, 14 April 2019 - 09:02
Manual manipulation of Interrupt Vector Table on AVR platform
It should only be : push zh push zl ld zh ld zl ijmp and at the routine pop zl pop zh 'normal ISR code   If you reserve two (low)registers the push and pop can just be two...
Thursday, 11 April 2019 - 05:43
fastest 8bit atmel microcontroller for quadcopter implemantation
If you already have most running on a 328p the question is how big is the CPU load now? how fast do you currently run ?   If this just is fun / shool project , then...
Sunday, 7 April 2019 - 10:45
SREG C Bit on MUL (unsigned) instruction
Yes it would be nice with 16 bit LPM, and I'm sure that if the chip should be developed today it would have it, but the old AVR design was "more" 8 bit and beside of X,Y and Z the...
Thursday, 4 April 2019 - 18:54
SREG C Bit on MUL (unsigned) instruction
No you miss the point with the AVR memory structure, is't a Harvard structure where code and data are separate.      The Flash is 16 bit NOT 8, that is why it...
Thursday, 4 April 2019 - 16:41
How Reliable Are MCU's?
Cost is relative is it a $5 toy or a satellite or in a medical instrument where failure can cost life.  
Monday, 1 April 2019 - 20:20
ATMega1284P ELPM instruction issue
??? ATMega1284P has 128k flash so addr is > 16 bit, hence the RAMPZ and ELPM usage rather than LPM ...     In Flash you normally have code! on a AVR the code is 16...
Sunday, 31 March 2019 - 14:03
ATMega1284P ELPM instruction issue
You write : The load from 0x0859 loaded the correct value, the others did not. How do you know that ? and how do you know to start at 0x0859 ?   Remember that flash is 16...
Sunday, 31 March 2019 - 13:32
SREG C Bit on MUL (unsigned) instruction
If you want to learn more about the different MUL instruction then read the old Atmel AVR201 appnote, hos microchip it's  AN_1631 : Using the 8-bit AVR Hardware Multiplier
Sunday, 31 March 2019 - 08:54
How Reliable Are MCU's?
I remember back in 1980 a friend had a 6502 that didn't work in a UK 101, but fine in a PET2001.  After a lot of tests it was just one instruction where a flag in some...
Saturday, 30 March 2019 - 17:56

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