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Howdy,
I am quite certain that getting any definitive answers is far fetched but trying my luck.
The above figure describes the CPU timing information for a single machine cycle of the AT89 series from Microchip. I'm curious if any of the people here know at a very high level, what happens in states S2,S3,S5 and S6?
Thanks
That's not really anything to do with Keil.
Have you tried to find a copy of the so-called "bible" for the 8051?
http://www.8052mcu.com/faqs/120112 - now all long-dead
8051 Family Architecture: http://ecee.colorado.edu/~mcclurel/p8051arc.pdf
8051 family programmer’s guide and instruction set: http://ecee.colorado.edu/~mcclurel/p8051pg.pdf
8051 Family Hardware Description: http://ecee.colorado.edu/~mcclurel/p8051hw.pdf
Intel MCS(R) 51 Microcontroller Family User's Manual: http://web.mit.edu/6.115/www/document/8051.pdf
These Atmel links still seems to work: http://www.8052mcu.com/forum/read/187978
#8051bible