Hi, Using the ST lib. I could only initialize and toggle pin only on port 9 and 8. I tried the same thing with other port and nothing work!. Is it right that the ST lib. that came with the new keil development kit is a recompiled one? I modify the example provided by keil. it's at this location ..\RV30\Examples\ST\STR91xLib\GPIO\EXAMPLE1 I just change GPIO9 to the other value GPIO8,7...0 Only port 9 and 8 work. Port 7 on the keil evaluation board, is used to drive 8 LEDs nothing special. Is there anything that I should do regard the other ports? Thanks