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cheap and basic microcontroller

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abhimanyu:
hi
i have experience of using atmega 16/32/.. series microcontrollers
i have used spi programming through usbasp and parallen db25 port, adc, i/o functions of atmega

now i need a microcontroller with the following specifications:
1 adc channel 8 bit
3 i/o pins
easy to make its hardware as i will not be able to purchase evaluation board
AS CHEAP AS IT CAN BE
ram:512 kb
non volatile flash 512 kb
 
can i get some suggestions

Simon:
PIC 12F615 it's about the most feature full of the 12F' series without spending serious money

alm:
Most specs are pretty basic, but 512kB ram / flash is a lot, I don't think you'll find many 8-bit micros that can do that, might have to move up to 16-bit or even 32-bit for that. Apart from that, almost any micro would do. If you have the experience and tools for AVR, I'd start looking for those, since you wouldn't need to spend as much time studying the documentation, and don't have to invest in a programmer. Apart from the RAM/flash requirements, something like an ATtiny13 or ATtiny25/45/85 would do, all are available in DIP-8. For 512kB RAM/flash, you'd probably need to look at ARM/AVR32/PIC32, which are usually not cheap or available in DIP.

mikeselectricstuff:

--- Quote from: abhimanyu on August 28, 2010, 10:10:17 am ---hi
i have experience of using atmega 16/32/.. series microcontrollers
i have used spi programming through usbasp and parallen db25 port, adc, i/o functions of atmega

now i need a microcontroller with the following specifications:
1 adc channel 8 bit
3 i/o pins
easy to make its hardware as i will not be able to purchase evaluation board
AS CHEAP AS IT CAN BE
ram:512 kb
non volatile flash 512 kb
 
can i get some suggestions


--- End quote ---
Do you really mean 512k ram and rom? If so your choices are somewhat limited, and it will come with somewhat more than 4 IO pins, cost a lot more than an ATMega and definitely won't be in a DIP package..!

--- Quote ---PIC 12F615 it's about the most feature full of the 12F' series without spending serious money

--- End quote ---
12F617 is a significant improvement on the 615 as it has self-programming and double the flash/ram for around the same price. However if you really need 512 bytes RAM you'll need to look further up market. RAM is quite expensive in silicon-area terms, which is why you don't see low-end parts with lots of it.
 

Simon:
well I'm looking into the 12F683, what was the improvement on the '615 that the '617 made ?

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