## 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

```