Front panel IC-706
- 1 Cable pinout
- 2 Switch on
- 3 Communication
- 4 Commands Panel to Radio
- 5 Commands Radio to Panel
- 6 References
- 7 Thanks
Pin Signal Color Description 1 LRXD Yellow Data transfer from front panel to the radio. 2 LTXD Black Data transfer from radio to the front panel. 3 8V Blue DC power (8V) to the front panel. 4 AF Red Output audio to headphone jacket. 5 GND Shield Data, power, output audio and power control ground. 6 MIC White Microphone input. 7 MICE Green shield Microphone ground. 8 PWK White Power control (switch ON button). Active in low.
Power switch on panel turns PWK signal to low (ground). Radio turns on supply voltage on pin 8V.
Both sides communicate at 19200 Baud, 8 bits, no parity, 1 stop bit. Protocol is similar to CI-V control. AFAIK it is not published so next informations are taked by reverse-engineering.
- Packet starts with Preamble code (0xfe).
- Second byte is probably Command number.
- Folows Data area with variable length.
- Last byte is End of message code (0xfd).
- Data bytes 0xfd 0xfe and 0xff are sent with escape prefix:
- 0xfd sent as 0xff 0x0d
- 0xfe sent as 0xff 0x0e
- 0xff sent as 0xff 0x0f
Commands Panel to Radio
Send mike's PTT state (bit 0) and whether the headphone jack is plugged in (bit 1).
FE 00 00 FD ; PTT OFF (RX), headphone jack out FE 00 01 FD ; PTT ON (TX), headphone jack out FE 00 02 FD ; PTT OFF (RX), headphone jack in FE 00 03 FD ; PTT ON (TX), headphone jack in
0x01 Buttons 1
Send state of button group 1. Button state is sent as bitmask in one data byte.
Bit Mask Button 0 0x01 F-1 1 0x02 MENU 2 0x04 TUNER/CALL 3 0x08 P.AMP/ATT 4 0x10 RIT/SUB 5 0x20 6 0x40 DN (mike) 7 0x80 UP (mike)
FE 01 04 FD ; button TUNER/CALL pressed FE 01 00 FD ; button TUNER/CALL released
0x02 Buttons 2
Send state of button group 2.
Bit Mask Button 0 0x01 Band down 1 0x02 Band up 2 0x04 TS 3 0x08 MODE 4 0x10 LOCK 5 0x20 DISPLAY 6 0x40 F-3 7 0x80 F-2
Main tune knob state. In 3rd byte is state 0x00 to 0xff. It is incremented by clockwise turn and decremented by counterclockwise turn;
Volume knob state. In 3rd byte is volume value 0x00 (mute) to 0xff (max volume).
Same as previous command but for RF/SQL knob.
Same as Volume command but for M-CH knob.
Same as Volume command but for RF/SQL knob.
Keepalive packet sent from panel to radio about every 100 ms. When no packet is received by radio in about 200 ms, it switches itself off. To provide reliable work over IP networks, this packet should be emulated.
FE 0B 00 FD
0xf0, 0xf1 Handshake
Probably some handshake sent between units during powerup.
R → P : FE F0 FD ; repeat many times P → R : FE F0 FD P → R : FE F1 FD R → P : FE F1 FD
Commands Radio to Panel
Data to display on panel. Looks like bitmask controlling particular LCD segments/LEDs. No detailed description available at this time.
Thanks to Alex OZ9AEC for PTT details and handshake description.