Yahoo Groups archive

AVR-Chat

Index last updated: 2026-04-28 22:41 UTC

Message

RE: [AVR-Chat] Fuse settings when shipping a device

2009-09-04 by Chuck Hackett

> From: John Samperi
> 
> At 01:32 PM 4/09/2009, you wrote:
> >         SPIEN:  Disable, no OC level debugging expected in the field
> >         SPIEN:  Disable to protect the code
> 
> You don't need to disable SPIEN, anyway you can't do it without
> using HVPP if you disable JTAG. Once the lock-bits are enabled
> then you can't read the chip with SPI without first erasing it.

Understood

> CKOPT MUST be enabled for 8MHZ and up, many people will tell you
> to enable at all times.

Yup, I have it enabled (I'm using 8MHz).  I only listed fuses having to do
with protection/programming/power save.

Thanks for the confirmation ...
 
Cheers,

Chuck Hackett
"Good judgment comes from experience, experience comes from bad judgment"
7.5" gauge Union Pacific Northern (4-8-4) 844
http://www.whitetrout.net/Chuck

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.