Is there any flash mcu (8051 clone) with more than 256B RAM?

[mrcube_ns]

8051 clone RAM?

Is there any flash mcu (8051 clone) with more than 256B of RAM?

Mr.Cube

PS. I use AT89S8252 but sometimes 256 isn't enough.

 

[silvio]

Re: 8051 clone RAM?

Hi mrcube_ns,

You can try Triscend TE520 with his 40kx8 dedicated system RAM (XDATA RAM) but it's not cheap at all.
My favorite is Philips P89C668 (with 8k RAM and 64k flash inside), as excelent quality / price ratio. h**p://www.semiconductors.philips.com/acrobat/datasheets/P89C660_662_664_668_4.pdf
For a full overview go to h**p://www.keil.com/dd/parm_search.asp
and select the parameters.

Alternatively go to **broken link removed**

Regards,
Silvio

 

[emilianbusca]

Re: 8051 clone RAM?

Hi,

You can try Atmel AT89C51RX2, x = A, B, C, D, E.
Also those MCUs provide more features like EEPROM, PCA, 6 clock cycle...

 

[waterman]

Re: 8051 clone RAM?

You could finf what you need from major makers for MCS-51
MCU. However, IDATA area for any MCS-51 is 256 bytes
max. Generally,. the extra SRAM will be accessed by
MOVX @R0 or
MOVX @R1 or
MOVX @DPTR

That is, they are allocated as the external SRAM.

Regards

 

[ntfreak]

Re: 8051 clone RAM?

I am currently designing with a ST upsd3224 @ 40MHz (8k sram, 256k primary flash, 32k secondary flash, usb).
Price is good - we are paying £3.10 each.

Worth a look.

Regards
NTFreak