I'm using LPC1347 board which has two group interrupts. I'd like to write simple program which uses only one pin group interrupt (for testing only). Edge interrupts works well but when I change interrupt type to low level sensitive (or / and - it doesn't matter) I can't clear interrupt status so the program is stucked in the ISR... Writing one to CTRL register has not any effect. Is different way of clearing level group interrupts?