(sorry about the re-post)

I need to get data from a machine that when one line (DATA_READY) goes down (low) the data on other line (DATA) is stable to read.
So far, so good. DATA_READY goes on INT0 in edge trigger mode and DATA goes in some P2/P3 pin.
Time is the issue here.
When DATA_READY goes down i have 50 uSecs to read DATA, and the interval between 2 DATA_READY's is about 350 to 400 uSecs. Also it happens in cycles, so when i get the 1st DATA_READY, i can expect to get more (or less) 600 in sequence, after that there can be lots of seconds before the next 'run'.
The question is 8051 *can* handle that ?
maybe the Dallas fast-8051 chip can ?

Thanks for any help.
Bruno Jessen