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Question asked by debruyne.marc on Jan 30, 2013
Latest reply on Feb 11, 2013 by debruyne.marc

i try to make a connection between the stm8s207 and an pcf8574.
the problem is with the software, because i can control the pcf8574 with an AARDVARK analyzer.
when i send a start and an adress (40) for pcf8574 then i do not see any pilses on PE1 and PE2

i use a crystal of 14.7456Mhz because of the UART.
please take a look at the attached assembly file.

and ,let me know what i doing wrong.

many thanks

marc debruyne