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SERIAL INTERRUPT MODE SELECTION
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IRQ
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E5
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Port 1 normal
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Pins 5 & 7 closed
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Port 1 shared interrupt mode
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Pins 3 & 5 closed
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Port 1 shared interrupt mode with resistor
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Pins 1 & 3 closed
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Port 2 normal
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Pins 6 & 8 closed
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Port 2 shared interrupt mode
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Pins 4 & 6 closed
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Port 2 shared interrupt mode with resistor
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Pins 2 & 4 closed
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Port 3 normal
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Pins 13 & 15 closed
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Port 3 shared interrupt mode
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Pins 11 & 13 closed
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Port 3 shared interrupt mode with resistor
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Pins 9 & 11 closed
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Port 4 normal
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Pins 14 & 16 closed
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Port 4 shared interrupt mode
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Pins 12 & 14 closed
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Port 4 shared interrupt mode with resistor
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Pins 10 & 12 closed
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Note: If the shared function is used, only one of the ports must be set to the pull-down resistor mode.
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