> What is the minimum current draw you can get on your PIC 18F* in 'RTC onl= y' > mode? > You may want to use a CR2050 (same as CR2032 but thicker, higher capacity= ). >=20 Since it is automotive you can use the battery you already have. The car=20 battery. The current consumption in off state should be way less than the s= elf=20 discharge rate of the battery. Also, the temperature swing could be very large in an automotive applicatio= n so=20 you have to take this into account when it comes to oscillator accuracy and= =20 drift. What is the clock going to be used for? /Ruben =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D Ruben J=F6nsson AB Liros Electronic Box 9124 200 39 Malm=F6 Sweden www.liros.se Tel +46 40142078 =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .