P89C669BBD Switch to ISP mode problem

Started by Dmitry Verevkin, September 18, 2008, 09:57:53 AM

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Dmitry Verevkin

September 18, 2008, 09:57:53 AM
Hello All
Please can anybody tell me - how can I switch to ISP mode my P89C669BBD or P89C60X2 chip?
I use RS-232 interface. Device is not answer to requests.

Andy Ayre

#1
September 19, 2008, 08:24:31 AM
It is typically achieved by holding the /PSEN signal during reset. Check the flash section of the user manual from NXP for a definitive answer.

Andy
Embedded Systems Academy, Inc.
support at esacademy dot com
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