Selecting 83C154 (8051) replacement

zelbi 10 months ago

Hello. I have a project from 1990's with a 83C154 microcontroller (8051).

Can somebody suggest a replacement popular 8051 derivative, good tools and long availability? The whole project was written in assembler with BSO/tasking assembler and tools. So minimal uC layout changes are preferred due to the assembly nature of the project.

Thanks :-)

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0 JWx 10 months ago
the pinout seems to be identical with 8051 - the question is which of 83c154 differences/improvements are in use?

And why 83? Was it using internal, factory-programmed ROM or external program memory was used? What is the size of the code?

If it is using external EPROM, the question is why no other 8x52 can be used? Is very high clock speed needed?

The list of differences seems rather short - according to this https://www.keil.com/dd/docs/datashts/atmel/c51_ao.pdf

difference between 8xc52 and 8xc154 amounts to:

timers include watchdog and 32bit timer/counter

serial reception error detection

new modes for power reduction

programmable impedance port

asynchronous counter/serial port mode during power-down

16KB of internal ROM

AT89S52 from Microchip is advertised to be in production and a successor of 89C52 (clocked up to 33MHz)

89S52 in DIP40 at Farnell portal
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0 rsjawale24 10 months ago in reply to JWx

AT89S52 was my choice of 8051 back in 2013 when I first learning MCU
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0 JWx 10 months ago in reply to rsjawale24

and it is still actively manufactured I think - it is marked as preferred replacement for 89C52.
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0 JWx 10 months ago in reply to rsjawale24

and it is still actively manufactured I think - it is marked as preferred replacement for 89C52.
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