RE: [AVR-Chat] Mega8 starting at wrong osc speed
2009-05-18 by John Samperi
At 06:34 PM 18/05/2009, you wrote: >I do not have a cap on the reset line. Coming from 8051 designs, So how did the 8051 get the correct reset? A 8051 diagram in front of me uses a 1uF to VCC and a 22K to ground, (reverse logic of the AVR) also I believe that some 8051 had something like a BOD so not much different. :-) I dare say that the reset circuit is the most important part of any design, regardless of the processor used, along with VCC bypass and proper clock circuitry, which seem to get overlooked the most. Regards John Samperi ******************************************************** Ampertronics Pty. Ltd. 11 Brokenwood Place Baulkham Hills, NSW 2153 AUSTRALIA Tel. (02) 9674-6495 Fax (02) 9674-8745 Website http://www.ampertronics.com.au *Electronic Design * Custom Products * Contract Assembly ********************************************************