We have to know the current capability of each individual pin and we have to know the current capability of the whole chip, it cant be any other way because it's too hard to make a chip that can handle 500ma total. So i see this not as a lie but as a matter of reading all the spec's not just one
Presumably the 'complaint' is that it's NOT in the datasheet, that only the individual pin rating is?.
Certainly PIC datasheets give both - I've never looked at an AVR one, but always presumed it was similar?.
DC Current Vcc and GND Pins . . . . . . . . . . . 200.0mA <------------------<<<
I should imagine that Atmel will continue as is for some time... MicroChip will have customers to keep they won't want to loose any!! We won't see much change for a bit!This is kind of funny but just what if microchip stops selling the 8 bit atmel chips why would they want too there 8 bit chips are cheaper and have lots more made into them.
The DIY people you are talking about (those who use old PICs such as 16F84) are used to using them. In my opinion, they have mastered that microcontrollers, so creating a project with them is a lot easier than using something newer, just like in the case of a regular driver who meets the latest generation of cars.The DIY people seems to be of two kinds - some use very old PICs even though there are newer better models (perhaps because of old Internet tutorials), while others move towards high end (Ethernet, Graphics etc.) and then often move away from PICs to ARM-based controllers which seems to have more hype now.
It's in the writing on the wall They want that loT Powerhouse they now have the pieces they need to make that happen. I can't wait to see a wifi chip that works out of the box and you can read it's data sheet LOL.
Sure they did that's not the point they now have lot better options to make faster and better one chip solutions.They already had all the things to create WiFi chips and IoT stuff. And they already sell WiFi modules.
You can now nock the rest out of the water.World-class embedded security solutions
- Atmel CryptoAuthentication™ — Offers product designers an extremely cost-effective, easy to design, tiny, and ultra-secure hardware authentication capability.
- Trusted Platform Module — The Atmel Trusted Platform Module (TPM) provides strong hardware-based public key (RSA) security on a single device for personal and tablet computers as well as embedded processor based systems.
- Atmel CryptoRF — Atmel CryptoRF® is a 13.56MHz RFID device family employing a 64-bit embedded hardware encryption engine, mutual authentication, and up to 64Kbits of user memory.
- Atmel CryptoMemory — The Atmel CryptoMemory® family offers a range of cost-efficient, high-security electrically erasable programmable read-only memory chips (EEPROMs) and host-side security for applications requiring comprehensive data protection.
That's good but 8 leds @ 40 mA is what and most people using a arduino think its ok LOL
Just in case they miss the math it's 120 mA over the rating of the chips max
Just like in the case of PIC where the max curent per output is 25mA , but, if all outputs were sourcing/sinking 25mA each, the controller would turn into a candle.
When playing with controllers, I use LEDs in order to check that the micro is giving a feedback. I am not planning to drive motors, actuators or other components with higher current consumption than a LED directly from Mcu. Microcontroller just controls the action of a circuit. Controllers have a higher output current than other ICs.AVR's use ALVC2 CMOS technology which at low voltage gives an RdsON of 25 Ohms rather than ALVxx of 50 Ohms, thus it is true each driver can handle 40mA with an 800mV rise and 32mW per driver. Total power dissipation must factor how many drivers are ON simultaneously drawing this power.
To verify yourself, read the Vol/Iol specs for worst case near the end of the spec.
The DIY people you are talking about (those who use old PICs such as 16F84) are used to using them. In my opinion, they have mastered that microcontrollers, so creating a project with them is a lot easier than using something newer, just like in the case of a regular driver who meets the latest generation of cars.
AndreiOh, sorry. That's true.
As for the output curent, I don't see the point in having a larger curent per output, when the modern LED curent consumption is very small and it is very bright. Perhaps for driving more leds without a buffer transistor...
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