hi guys
i have red some where in this forum that we could operate the 8051 MCU at 24 MHz
is that true ?
because i thaught that it operates at 12 MHz max
is it possible!!?
There are many producers of microcontrollers based on 8051 core. In time, the core was enhanced in speed (one of the first to do that was Dallas Semiconductor) and there are producers that have products running at 40 Mhz external clock or even higher. Anyway it's a little bit difficult to add peripheral on the data bus at this high speeds due the timing constraints.
Hi. Look Cygnal site(www.cygnal.com) the made x51 up to 100MIPS.
\http://www2.silabs.com/tgwWebApp/appmanager/tgw/tgwHome;jsessionid=C4JgplMp9qC92XhS81pn16GXJFMpytgLLvQf2TqL4rz3DlnGGdnh!-2099199467?_nfpb=true&_pageLabel=GenericContentPage&contentObjectId=/public/web_content/products/Microcontrollers/Small_Form_Factor/en/SFF_matrix.htm
from ATMEL like AT89S51, AT89S52, AT89S52 has max frequency 33Mhz
dependent on device mark.
if AT89S52-12 frequency max is 12 Mhz
if AT89S52-24 frequency max is 24 Mhz
if AT89S52-33 frequency max is 33 Mhz
Added after 44 seconds:
from ATMEL like AT89S51, AT89S52, AT89S52 has max frequency 33Mhz
dependent on device mark.
if AT89S52-12 frequency max is 12 Mhz
if AT89S52-24 frequency max is 24 Mhz
if AT89S52-33 frequency max is 33 Mhz
Dont look at the frequency alone!. The operations/cycle is just as important. There are MCU's with 1 operation per cycle (clockcycle) while most of them are 1 operation per 6 or 12 cycles. So a 10Mhz system on 1 op./cycle is just as fast as a 120Mhz 12 cycle/op. If you need a very high speed 8051 concider a 16 bit (AVR or ARM) processor, otherwise you might end up buying extremely fast (expensive and more difficult) periphiral components.
what about analog device's mcu of 8051 and 8052 core?I 've receive free sample of aduc841 which is 20mpis.Does it can be programmed with the programmer of commom 8051?
thanks