Hi everyone, Has anyone interfaced a PIC to the National Semi LMC1983 audio control IC ? It uses the 'IM' bus (Inter-Metall) which is a 3 wire serial control from ITT (Germany). I look (from datasheet) to be driving it correctly but the IC doesn't respond at all. There's probably a simple reason for it but many hours so far haven't found it. Does anyone have any experience with this device or any IM bus type slaves ? I am using a 16F84 to drive the IM bus with. Any ideas greatfully received ! Regards... ___________________________________ David Duffy Audio Visual Devices Ph: +61 7 38210362 Fax +61 7 38210281 AVD@uq.net.au Unit 8, 9-11 Trade Street Cleveland, Qld, 4163, Australia. ___________________________________