New Chip Selection

[pramodjaipur]

Hello,

We are working on 8051 project.

Our code size after compile reaches around 100K; using code banking with 2 banks;

All code written in "C", and using our own RTOS,

Searching new micro controller with following features and facility:

1. it can support at least 128 K code or more;
2. Security feature to lock the micro controller;
3. Need RTC, UART (2 will be better), Serial Port,
4. Internal DATA required around > 1K; presently compressed till 256b.
5. Lot of latch and logic and DTMF, Switching IC's with working on 5V.
6. XDATA RAM required 128K.

Presently we are using 89C52X2BN >> Philips Make, (in one model using 6X)

Please suggest a new chip; which can deliver the all required features.

Thanks for Creating wonderful form

[samir]

Hello,

We are working on 8051 project.

Our code size after compile reaches around 100K; using code banking with 2 banks;

All code written in "C", and using our own RTOS,

Searching new micro controller with following features and facility:

1. it can support at least 128 K code or more;
2. Security feature to lock the micro controller;
3. Need RTC, UART (2 will be better), Serial Port,
4. Internal DATA required around > 1K; presently compressed till 256b.
5. Lot of latch and logic and DTMF, Switching IC's with working on 5V.
6. XDATA RAM required 128K.

Presently we are using 89C52X2BN >> Philips Make, (in one model using 6X)

Please suggest a new chip; which can deliver the all required features.

Thanks for Creating wonderful form

at mega128 or lpc2138 will do for your requirement

[pramodjaipur]

Hi,

Thanks for your reply;

Till date we have not deigned any ARM based Product; We know only 8051;

Please suggest some link or information regarding migrate from 8051 >>> ARM; as we seen: ARM operate on 3.3V and we are using other latch & Logic IC which operate on 5V, other switching ic CD22100 operate on 12V, so how we can do the Hi-Lo to latch the switch.

Any site related to guide how to jump from 8051 to ARM;

thanks in advance.

[darkore]

Your best bet are the Silabs (ex Cygnal) 8051 microcontrollers:

http://www.silabs.com/tgwWebApp/appmanager/tgw/tgwHome?_nfpb=true&_pageLabel=interactiveGuide&col=mips

Except that they're expensive as hell. You're much better off using ARM micros.

[bluex]

... as we seen: ARM operate on 3.3V and we are using other latch & Logic IC which operate on 5V, other switching ic CD22100 operate on 12V, so how we can do the Hi-Lo to latch the switch.

ARM controllers like Philipc LPCxxxx work with  3.3V but their IO pins are 5V tolerant, that means that only the supply for the processor must be 3.3V, all other IO pins can be connected to a 5V logic without any problem, and trust me, at the price you can get them, and for the number or hardware devices integrated in them, this is the best choice.
Best regards

[pramodjaipur]

... as we seen: ARM operate on 3.3V and we are using other latch & Logic IC which operate on 5V, other switching ic CD22100 operate on 12V, so how we can do the Hi-Lo to latch the switch.

ARM controllers like Philipc LPCxxxx work with  3.3V but their IO pins are 5V tolerant, that means that only the supply for the processor must be 3.3V, all other IO pins can be connected to a 5V logic without any problem, and trust me, .....

Thanks for your reply...
as general i am asking; if we feed input 3.3V >>> can it drive the 5 V chips...

the features and price of ARM is very economical: if i compare the additional chips which we are using in our board like Uart 16C550 X 2, RTC, 628128 "128K S RAM"comfortable with Serial RAM with I2C, External EP-ROM, Direct interface to support > 64K (in 8051 >> code banking, XDATA banking  )

so we have to replace only micro controller rest all components are same as old one >> modify the power supply for 3.3V for processor. Please suggest.

thanks in advance.

[bluex]

Yes, you only have to power the mcu with 3,3 volts, but the all the remaining devices can continue to be powered 5V and the ARM processor can drive (read/write) them directly. You can have a look at the EasyARM dev board from mikroelektronika. You can just see its Schematic, you have a jumper to switch all the board to 5v or 3,3 volt, but the proecessor is powered using a 3.3 regulator.
If you use a Philips LPC2148 for example  you'll have about 64K of RAM and 512Ko of flash and 2 hardware SERIAL devices, and an internal RTC (with date) with calendar and Alarms (flash protection)... and lot lot of other nice devices (I2C, SPI, USB, ....), onchip-hardware bootloader.... and it cost about less than 20 euro each unit.
ATMEL also has very nice and very cheap ARM device with more memory and more flash.
and most important, they can work at (for the LPC2148 with PLL enabled)  about 68MHz, with true hardware stack ... lot of vectored interrupts ... and TRUE 32Bit registers with 64Bit multiply capability ...

Best regards