Breaking News
Newest First | Oldest First | Threaded View
<<   <   Page 3 / 3
User Rank
re: Who has the lowest power MCU?
KaiserSoze   4/13/2012 8:00:48 AM
I note only this detail: to win over the MSP430, Microchip take the sleep/standby current of one item(PIC 24FJ12 etc, 16-bit), and the Active current of one other Item (PIC16LF etc, 8-bit). It seem to me a non-correct method of comparison. It would be the same if TI proposed the best data taking them from several devices, taking the best from where TI have convenience (but TI doesn't acts so). I think that these tricks aren't honourable for a big firm as Microchip. As PM EDT, I don't work for any of two rival.

User Rank
re: Who has the lowest power MCU?
Jason.Tollefson   4/12/2012 11:08:48 PM
XORBIT, Thanks for your comments regarding Microchip’s PIC® MCUs, and you are correct that newer parts are much lower power than prior parts. For Sleep modes, Microchip offers up to three; Sleep, Low Voltage Sleep, and Deep Sleep. In every mode, PIC MCUs with eXtreme Low Power (XLP) Technology have multiple methods for waking from sleep, such as an RTC, a Watchdog Timer, Timers, and Interrupts. Regarding work done per clock cycle, I would ask you to examine the number of instruction cycles listed in the MSP430 User Guide, SLAU056G, Page 3-71. Depending on the type of memory addressed, the instruction can be up to 6 cycles for a single instruction. By contrast, 90% of PIC24F instructions are 1 cycle, which is 2 clocks. We tested this with the following C-code, which merely copies 32 bytes from one memory location to another: Sleep(); LATBbits.LATB2 = 1; memcpy(testArr1,testArr2,sizeof(testArr1)); LATBbits.LATB2 = 0; At 4 MHz, this resulted in an execution time of 32 µs for PIC24F, and 80 µs for MSP430. The resultant energy saved by the PIC24F over the MSP430 is 2X! We also ran side by side comparisons of PIC24F and MSP430 using industry-standard benchmarks and found that PIC24F executes code 1.5 to 5 times faster at a given frequency. I would ask you to take a second look at Microchip’s PIC MCUs with XLP Technology and reevaluate our performance in a real-world example. I think you may find that Microchip looks a lot better than you first thought. Disclaimer: I work for Microchip Technology Incorporated, which is committed to delivering outstanding value in low-power MCUs. -Jason Tollefson, 16-bit Microcontroller Senior Product Marketing Manager, Microchip Technology Inc.

User Rank
re: Who has the lowest power MCU?
t.alex   4/12/2012 10:50:12 PM
Benchmarking like this is quite subjective and it is quite difficult to get a fair result. People typically look at the overall system/product rather than just the MCU.

User Rank
re: Who has the lowest power MCU?
xorbit   4/12/2012 6:44:44 PM
I don't know if this is still the case with newer parts, but it has been my experience in the past that Microchip parts looked good on paper, but sorely lacked when it came to actual real-world use. For instance, they would brag about ultra low power, but the only way to wake up the part would be to reset it. There were other things like that. Also, uA/MHz is an irrelevant number when comparing PICs with MSP430s. PIC is the Pentium 4 of microcontrollers: it gets very little done per clock cycle. So it needs to run at much higher MHz to get the same amount of processing done as the extremely efficient MSP430 architecture. A comparison in uA/DMIPS, taking the difference in DMIPS/MHz into account when running real code, would be much more useful for real-world comparisons. I can guarantee the picture would not look pretty for Microchip. Disclaimer: I do not work for either Microchip or TI, but I've compared the architectures in the past.

<<   <   Page 3 / 3 Parts Search

185 million searchable parts
(please enter a part number or hit search to begin)

What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.

Brought to you by:

Most Recent Comments
Most Recent Messages
4:48:30 PM
michigan0 Sang Kim First, 28nm bulk is in volume manufacturing for several years by the major semiconductor companies but not 28nm FDSOI today yet. Why not? Simply because unlike 28nm bulk the LDD(Lightly Doped Drain) to minimize hot carrier generation can't be implemented in 28nm FDSOI. Furthermore, hot carrier reliability becomes worse with scaling, That is the major reason why 28nm FDSOI is not manufacturable today and will not be. Second, how can you suppress the leakage currents from such ultra short 7nm due to the short channel effects? How thin SOI thickness is required to prevent punch-through of un-dopped 7nm FDSOI? Possibly less than 4nm. Depositing such an ultra thin film less then 4nm filum uniformly and reliably over 12" wafers at the manufacturing line is extremely difficult or not even manufacturable. If not manufacturable, the 7nm FDSOI debate is over!Third, what happens when hot carriers are generated near the drain at normal operation of 7nm FDSOI? Electrons go to the positively biased drain with no harm but where the holes to go? The holes can't go to the substrate because of the thin BOX layer. Some holes may become trapped at the BOX layer causing Vt shift. However, the vast majority of holes drift through the the un-dopped SOI channel toward the N+Source,...
Like Us on Facebook
Special Video Section
Once the base layer of a design has been taped out, making ...
In this short video we show an LED light demo to ...
The LTC2380-24 is a versatile 24-bit SAR ADC that combines ...
In this short video we show an LED light demo to ...
Wireless Power enables applications where it is difficult ...
LEDs are being used in current luxury model automotive ...
With design sizes expected to increase by 5X through 2020, ...
Linear Technology’s LT8330 and LT8331, two Low Quiescent ...
The quality and reliability of Mill-Max's two-piece ...
LED lighting is an important feature in today’s and future ...
The LT8602 has two high voltage buck regulators with an ...
Silego Technology’s highly versatile Mixed-signal GreenPAK ...
The quality and reliability of Mill-Max's two-piece ...
Why the multicopter? It has every thing in it. 58 of ...
Security is important in all parts of the IoT chain, ...
Infineon explains their philosophy and why the multicopter ...
The LTC4282 Hot SwapTM controller allows a board to be ...
This video highlights the Zynq® UltraScale+™ MPSoC, and sho...
Homeowners may soon be able to store the energy generated ...
The LTC®6363 is a low power, low noise, fully differential ...