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What pins are used for In System Programming(ISP) of the mega103/603 controller ?

April 26, 2017controller ISP pins Programming system Used

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What pins are used for In System Programming(ISP) of the mega103/603 controller ?

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Answer The In System Program interface for mega103/603 controller should be connected to the following pins on mega103/603: SCK – SCK (PB1,pin 11) MISO – PDO (PE1,pin 3) MOSI – PDI (PE0,pin 2) RESET – RESET (RESET,pin 20) The PEN(Program Enable) pin can be used as an alternative to RESET. The two pins have the same functionality, (they activate the internal iRESET signal) but PEN is read only during Power On (VCC approx. 1.2 volts). If PEN is not used, it is recommended to tie this pin to VCC. RESET is then used as on all other AVR parts to enable serial programming. Question: I can not get my AVR emulator to drive an external load correctly, when I use a voltmeter to measure the pins on the emulator POD it seems like the pin can not drive the load.