Open interface III

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!!ATMEGA-2560 pinout (rev 3.1415) \| Arduino pins \| connect to \| in/out \| Note \| \| RX0 \| USB \| in \| ''Connect to USB/serial interface'' \| \| TX0 \| USB \| out \| ''use for command CW keyer or firmware upload'' \| \| D2 \| Interlock \| in \| pull-up external, '''Interrupt 0''' \| \| D3 \| PTT-232 \| in \| pull-up external, '''Interrupt 1''' \| \| D4 \| CW tone \| out \| \| \| D5 \| ACC pin6 \| \| PWM \| \| D6 \| LCD-D4 \| out \| \| \| D7 \| LCD-D5 \| out \| \| \| D8 \| LCD-D6 \| out \| \| \| D9 \| LCD-D7 \| out \| \| \| D10 \| Ethernet SCS \| out \| \| \| D11 \| ACC pin9 \| \| PWM \| \| D12 \| ACC pin10 \| \| PWM \| \| D13 \| ACC pin5 \| \| PWM \| \| TX3 \| ACC pin3 \| out \| ''+ Internal pins'' \| \| RX3 \| ACC pin1 \| in \| ''+ Internal pins'' \| \| TX2 \| CAT \| out \| ''Connected in parallel to USB/serial CAT interface'' \| \| RX2 \| CAT \| in \| ''use for CAT sniffing or TX request'' \| \| D18 \| Encoder-B \| in \| pull-up '''internal''' (optional external), '''Interrupt 5''' (TX1) \| \| D19 \| PTT foot \| in \| pull-up external, '''Interrupt 4''' (RX1) \| \| D20 \| SDA - ACC pin16 \| in/out \| I2C, Interrupt 3 \| \| D21 \| SCL - ACC pin15 \| out \| I2C, Interrupt 2 \| \| D22 \| PTT2 \| out \| \| \| D23 \| FSK \| out \| keying from arduino \| \| D24 \| Encoder-A \| in \| pull-up '''internal''' (optional external) \| \| D25 \| PTT3 \| out \| \| \| D26 \| paddle Left \| in \| pull-up external \| \| D27 \| WinKey \| out \| '''HIGH''' if CW keying running (disable DTR/RTS) \| \| D28 \| paddle Right \| in \| pull-up external \| \| D29 \| AFSK \| out\| '''HIGH''' if AFSK keying (switch TX audio path) \| \| D30 \| ACC pin7 \| \| \| \| D31 \| PTT-PA \| out \| \| \| D32 \| ACC pin8 \| \| \| \| D33 \| FSK detector \| in \| pull-up external \| \| D34 \| CW1 \| out \| \| \| D35 \| CW2 \| out \| \| \| D36 \| MENU \| in \| pull-up external \| \| D37 \| LCD-E \| out \| \| \| D38 \| ACC pin11 \| \| \| \| D39 \| self reset \| out \| '''HIGH''' (enable with jumper JP5) \| \| D40 \| Sequencer \| out \| \| \| D41 \| PTT1 \| out \| \| \| D42 \| BCD1 \| out \| TTL Band data \| \| D43 \| BCD2 \| out \| TTL Band data \| \| D44 \| BCD3 \| out \| TTL Band data \| \| D45 \| BCD4 \| out \| TTL Band data \| \| D46 \| Ethernet detect \| in \| pull-up '''internal''' \| \| D47 \| ACC pin4 \| \| \| \| D48 \| Internal SMT pad \| \| Free \| \| D49 \| Internal SMT pad \| \| Free \| \| D50 \| MISO \| out \| \| \| D51 \| MOSI \| out \| \| \| D52 \| SCK \| out \| \| \| D53 \| microSD CS \| out \| \| \| A0 \| Internal SMT pad \| \| Free \| \| A1 \| CW keyer Memory button \| in \| pull-up external \| \| A2 \| LCD-RS \| out \| \| \| A3 \| ACC pin12 \| \| \| \| A4 \| ACC pin13 \| \| \| \| A5 \| microSD plug \| in \| pull-up '''internal''' \| \| A6 \| measure 3.3V \| in \| \| \| A7 \| measure input voltage \| in \| coefficient 11 \| \| A8 \| ACC pin14 \| \| \| \| A9 \| ACC pin17 \| \| \| \| A10 \| - \| \| Free \| \| A11 \| ACC pin19 \| \| \| \| A12 \| - \| \| Free \| \| A13 \| - \| \| Free \| \| A14 \| - \| \| Free \| \| A15 \| - \| \| Free \| * If RC circuits installed ---- [<<- Web page\|https://remoteqth.com/open-interface.php]
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