Microcontroller

Microntrollers come with multiples of 8 pins for GPIO. i.e. 8, 16 or 24 pins for and more. 10bit resolution??? For ADC?

Can I recommend you get yourself a Launchpad (farnell part number 1853793). Download code composer studio v5 from TI, and you will be started in no time. The MSP430g2553 that comes with it has a 10bit ADC, and 16GPIO pins. Very good for someone new to microcontrollers. And only £4.88 in british money :)

Gordon McIntosh said:

Microntrollers come with multiples of 8 pins for GPIO

No, that's not true - there are several microcontroller ranges available in packages where the entire pin count is only 8 - or even less!

eg,

http://www.atmel.com/products/microcontrollers/avr/tinyavr.aspx

http://www.microchip.com/paramchartsearch/chart.aspx?branchid=1001

http://www.nxp.com/products/microcontrollers/cortex_m0_m0/LPC810M021FN8.html 

I presume you meant to say, "MSP430 Microntrollers come with multiples of 8 pins for GPIO" ?

(which would be fair enough - as this is the MSP430 forum!)

Ahh *redface*

I only have limited experience with MCU's. I suppose if you wanted a really small package then that would make sense, otherwise some extra i/o's are usefull for debugging or additional features. I just presumed he wanted a minimum of 2 i/o's.

Keyur Hariya said:

only 1 or 2 I/O pin/s

Also, I/O usually means digital I/O, so it has 1 bit resolution.

I guess you mean you need an MCU with ADC and DAC. You could use the good old MSP430F1611. It has 8 analog inputs with 8-10-12 bit resolution (selectable) and two of them can be used for analog output with 8-10-12 bit resolution.
However, this MCU has 64 pins, so it isn't really small.

There are more modern MSPs but they usually have even more pins (bigger case).

A product selector that shows all available MSPs is found here.

Hi 

Maybe you can try this one chip

8 Pin(VCC,GND,2*SBW pin, And 4 I/O pins you can use it(include SPI function)).

http://www.ti.com/lit/ds/symlink/msp430g2230.pdf

Best Regards,

Thanks to all for reply.
I'm sorry, my question was not exactly to the point, since I'm new.
I need an microcontroller which has only 1 or 2 analog input pins, more preffered with 1 analog input pin, with 10-bit resolution. so it requires ADC also & d application is very small application so minimum pins in MCU

This might be useful: http://www.ti.com/lsds/ti/microcontroller/16-bit_msp430/products.page#p121=10;10-bit%20SAR

You can get http://www.ti.com/product/msp430g2230 in SOIC 8 package

Regards,
Maciej 

Keyur Hariya said:

I need an microcontroller which has only 1 or 2 analog input pins, more preffered with 1 analog input pin, with 10-bit resolution.

There are some smaller MSPs with an SD16 ADC. With usually only 3 or 4 inputs (and also its pins chared with optional digital functions). The SD16 offers higher resolution but is significantly slower (up to 16 bits @ 1kHz). And not as easy to handle as the ADC10/12.

Use the product selector on the TI website to pick a package size and see which MSPs are available.