Hello everybody..I hope you pupil have great time.. Actually we are using 8051 8 bit controller for our weighing scale product since 15 yrs.. External ADC,external USB,external RTC etc .. Now need to go with ARM to taste the new technology.. I'm a debut in ARM..So pls give me some ARM family details which must have internal features like USB support, LCD, UARTS more than 3 and as usual SPI /I2C interfaces.. and also camera support.. And i heard that Atmel ARM processor have inbuilt Zigbee? Is it so?? Therefore,i need the features of ARM processors which makes our circuit design in compact..
Yes you are absolutely right!! I'm dealing with S-type Load cell.. Itz sensitivity is 2mv/V.. The ADC for this is 16 bit resolution.. I'm not expect zigbee in my module.. Itz just asking.. And will the ARM processor comes with GSM/GPRS facility??If it is,its more convenient for me.. ARM cortex M3 provides me the basic features..Is it ok for me expectation??
Radios include GSM are typically implemented as separate modules, not least for simple integration and certification issues. I don't think anyone in your position would implement a chip level GSM/GPRS/CDMA/EVDO or WiFi solution, the vendors just laugh at us. They'd expect you to have a lot of volume (huge), and a lot of RF experience. Consider options to socket the modem on a daughter board, so as to allow for multiple standards, multiple vendors and obsolesce or design cycle replacement.
Look at your current design and decide what you can/cannot integrate into a denser ARM part. You're likely to have to retain your external ADC (24-bit, I2C ?), the ADC on general purpose micro-controllers are designed for utility not precision, usually about 12-bit and hard to separate cleanly from digital logic banging around at 60-200 MHz (or whatever).
Take a look at the STM32F2 and F4 series parts, have external buses for smart LCD panel integration, USB, and a DCMI camera interface. Plenty of serial ports for wireless modems, etc.