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Flash Magic Forum

In-System Programming Support => P89C51Rx+/P89C51Rx2/P89C66x/P89C6xX2/P89V66x => Topic started by: Dmitry Verevkin on September 18, 2008, 09:57:53 AM

Title: P89C669BBD Switch to ISP mode problem
Post by: Dmitry Verevkin on 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.

Title: Re: P89C669BBD Switch to ISP mode problem
Post by: Andy Ayre on 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
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