Micro PA50 controller
Ports
/*
* D0 - PD0 RX
* D1 - PD1 TX
* D2 - PD2 IN PTT IN
* D3 - PD3 IN KEY
* D4 - PD4 OUT RELAY5 TX SWITCH
* D5 - PD5 IN FREQ OSC MC74HC4060A
* D6 - PD6 OUT 10M
* D7 - PD7 OUT 20M
* D8 - PB0 OUT 40M
* D9 - PB1 OUT 80M
* D10 - PB2 OUT BUZZER
* D11 - PB3 IN TEMP DS18B20
* D12 - PB4 OUT FAN
* D13 - PB5 OUT PA ATT SWITCH
*
* A0 PC0 - V.REV
* A1 PC1 - V.FWD
* A2 PC2 - ICOM
* A3 PC3 - V.VCC
*/