MC908JL8 Monitor Mode

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MC908JL8 Monitor Mode

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jarik
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Hi, I need any help.

I made a programmer for entering Monitor Mode, but something wrong with it. The programmer I use is this: http://www.edaboard.com/thread238381.html, only without one oscilator and insted 74hc125 I used 1N4148, like in AN2317. I tried everything, but only loopback I see in the status window. What do I do wrong? I tried to switch Vdd and Vtst direct from MCU, and nothing. Need advise.

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