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watch dog

jliu
Associate II
Posted on May 26, 2004 at 01:54

watch dog

5 REPLIES 5
s_abbot
Associate II
Posted on May 17, 2011 at 12:00

ben, the WD is enabled at bootup, all you need to do is keep feeding WDRST, to disable the WD then you need to concern yourself with WDKEY.

Stephen

[ This message was edited by: sabbot on 14-05-2004 10:06 ]
jliu
Associate II
Posted on May 17, 2011 at 12:00

I thought all need to do to enable the watchdog timer is WDKEY = 0. if I don't reset WDRST periodically then will result in a reset of system. But an experiment has showed this way doesn't work. Can anybody tell me why?

joseph2399
Associate II
Posted on May 17, 2011 at 12:00

Ben007,

The watchdog timer in the uPSD32xx works well. Have you been able to resolve your issue? If not, please contact us at:

mailto:apps.psd@st.com

.

Please include the following information:

Name

Company Name

Phone Number

Location (City, State, Country)

uPSD part number of device being used (3234, 3254, etc.)

Application

Projected annual volume (units)

Regards,

uPSD Applications Engineering

[ This message was edited by: uPSD on 18-05-2004 07:20 ]
jliu
Associate II
Posted on May 17, 2011 at 12:00

I've figured out the watchdog problem using the trick posted early in this forum. It never works if follow the way stated by ST datasheet.

lwang
Associate II
Posted on May 17, 2011 at 12:00

Could you tell us what that ''trick'' is? Is the watchdog reset by accessing PCON?