Hi. Checked datasheet for 12F683 and 16F690. In the CCP section, "Compare mode", it says : When a match occurs, the CCP1 module may: - Toggle the CCP1 output. <<<=3D=3D=3D Note! - Set the CCP1 output. - Clear the CCP1 output. .... The action on the pin is based on the value of the CCP1M<3:0> control bits of the CCP1CON register. Now, the table for the CCP1CON register says : 1000 =3D Compare mode, set output on match (CCP1IF bit is set) 1001 =3D Compare mode, clear output on match (CCP1IF bit is set) There is no "toggle output on match" option there Is this a (known) datasheet error? There is nothing in the errata documents. Jan-Erik. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .