All things being equal, the programmer knowing what (s)he is doing, I have to strongly disagree. If an application goes to sleep and wakes up frequently, the internal oscillator and the wake-up time is of the essence. Only VERY FEW MCUs are good at this one, MSP430 and EFM32 being two of them.millwood said:power consumption is, in most applications, programming driven. if you are careful, you can achieve low power consumption with a non-MSP430 chip than you would with it.
If they are connected to mains or compared to an electric heater, this statement is surely true., If compared in an apple to apple fashion, depending on the MCU and assuming a smart programmer, this difference can easily be a factor >10 in battery life.millwood said:and in general, mcus don't take much power anyway.
All things being equal, the programmer knowing what (s)he is doing, I have to strongly disagree.
I have done lots of comparing other devices to the MSP430 and there are NOT many that can in deed compete.
My favorite based on specs (have not used it) is the Gecko family from Energy Micro. The EFM32 families can match or sometimes even beat the MSP430 in all aspects. ...
I was recently looking for a low power mcu, and was excited when I read EM's ad--the specs looked great. I wondered how they compared to the much more mature NXP LPC line... and the power consumptions are virtually identical. EM rates theirs at 180uA/MHz, whereas NXP rates theirs at a something like 9mA at 50MHz. If you do the math, they match.
Nifty marketing, anyway.
NXP has a very bad support, they never provide samples and are not very well known in some parts of the world, Also the company has gone through a bit of trouble with selling of plants in Europe. Surprisingly the demand for their chips has suddenly gone up after making so many redundant in Europe. what is the use of getting something like LPC1110 series out when you cant sell them to the people who need them.
Comparison MSP430 and XLPMicrochip has already done the comparison:
NXP has a very bad support, they never provide samples
Microchip has already done the comparison:
what is the harm in saving the context in flash and restoring it after the device wakes up?
its better than keeping the ram powered for 90% of the time the device is in sleep.
Dear Bob,........ snip ............
Microchip announced the reduction of deep sleep current from 20nA to 9nA which takes the bar further down. Microchip Announces Industry s First 8-bit Microcontroller With 128 KB Flash Memory in 28-pin Package PIC18F47J13 Technology Inc announced the
No offence as well, arguments are educational!
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