FT-8800R tech documentation

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Contents

Links

Technical

Pinouts

6P6C Main Unit to Panel Unit Pinout
Pin Name Description
1 MOD Buffered Modulation (AF) Input (~2.2kΩ source impedance)
2 POWERSW Active-low (pulled through 1KΩ resistor) momentary power switch signal
3 9V 9VDC regulated supply voltage for Panel Unit
4 GND Ground
5 RXD Head unit Asynchronous serial (19.2 kbps 8N1) Receive
6 TXD Head unit Asynchronous serial (19.2 kbps 8N1) Transmit
6P6C Panel Unit microphone connector
Pin Name Description
1 SW2 Matrix keypad column input
2 SW1 Matrix keypad row input
3 9V 9VDC regulated supply voltage
4 GND Ground
5 MIC Electret microphone audio input
6 PTT Active-low push-to-talk switch

Protocol

Measured parameters
Parameter (Unit) Description Value
Communication Asynchronous communication 19.2 kbps 8-N-1 (8 data bits, no parity, 1 stop bit)
Head unit update period (ms) Time between start of panel unit

TX packet to start of next packet

TBD (on order of 20)
Main unit update period (ms) Time between start of main unit

TX packet to start of next packet

TBD (on order of 40)
Watchdog Time (s) Minimum time between last update packet

from panel unit and when main unit shutdowns (powers off)

TBD

TODO: Information for encoder dial button signal and WIRES (DXKEY) is missing.

Panel Unit packet structure
Octet 0 1 2 3 4 5 6 7
0 Left encoder count since update

(2's complement - CW is positive)

SBO
1 Right encoder count since update

(2's complement - CW is positive)

SBZ
2 PTT input ADC
  • 7Fh ~ PTT disabled
  • 1Bh ~ PTT enabled
SBZ
3 Right squelch ring ADC (7Fh: open squelch) SBZ
4 Right volume control ADC (7Fh: max volume) SBZ
5 SW1 keypad matrix row ADC
  • 00h: 1-A
  • 1Ah: 4-B, UP
  • 32h: 7-C, DOWN
  • 4Ch: *-D
  • 64h: P1-P4
  • 7Fh: inactive
SBZ
6 Left squelch ring ADC (7Fh: open squelch) SBZ
7 Left volume control ADC (7Fh: max volume) SBZ
8 SW2 keypad matrix column ADC
  • 06h: UP/DWN
  • 1Bh: 1-*,P1
  • 33h: 2-0,P2
  • 4Ch: 3-#,P3
  • 67h: A-D,P4
  • 7Fh: inactive
SBZ
9 Panel right-side (multiplexed) buttons
  • 00h: SCN
  • 20h: HM
  • 40h: V/M
  • 60h: LOW
  • 7Fh: none
SBZ
10 Panel left-side (multiplexed) buttons
  • 00h: LOW
  • 20h: V/M
  • 40h: HM
  • 60h: SCN
  • 7Fh: none
SBZ
11 SET key SBZ
12 Hyper-memory key
  • 00: No key
  • 01-06: hyper selection

Main unit Packet

Packet definitions
Signal Description
Digits are numbered least-significant to most significant (right to left)

starting at 0.

F Frequency/Alpha 14-Segment displays
C Channel 7-segment displays
SM S-Meter segments (right-to-left)
BUSY Busy channel indicator
MAIN "Main" Band indicator
PMS Preferential Memory Scan Flag (Left-pointing arrow)
SKIP Skip Memory channel flag
ENC Tone encoder flag
DEC Tone decoder flag
DCS Digital Code Squelch flag
9600 9600bps Packet mode flag
PL Low TX Power flag
PM Medium TX Power flag
TX Transmitter active flag
SET Set mode active flag
LOCK Keypad lock flag
APO Auto power-off enable flag
PLUS Plus repeater shift flag
MINUS Minus repeater shift flag

Missing Information

  • MUTE, DCS, 9600 flags - These are in some of the unassigned bit position (need to recheck)
  • Display brightness - There is a dimmer setting, and the value must be conveyed in the packet somewhere.
Main Unit packet structure
Octet 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
0 U? APO PML FL.0.DP SML.8 FL.0.A FLL.0.B SBO FL.0.C FL.0.D FL.0.E FL.0.F FL.0.G PLL FL.0.H SBZ
2 FL.0.I FL.0.J SML.7 FL.0.K FL.0.L FL.0.M SML.6 SBZ FL.1.A FL.1.B FL.1.C FL.1.D FL.1.E FL.1.F FL.1.G SBZ
4 A? FL.1.H FL.1.I FL.1.J SML.5 FL.1.K FL.1.L SBZ FL.1.M SML.4 FL.2.A FL.2.B FL.2.C FL.2.D FL.2.E SBZ
6 FL.2.F FL.2.G A? FL.2.H FL.2.I FL.2.J SML.3 SBZ FL.2.K FL.2.L FL.2.M U? U? U? U? SBZ
8 FL.3.DP A? SML.2 FL.3.A FL.3.B FL.3.C FL.3.D SBZ FL.3.E FL.3.F FL.3.G A? FL.3.H FL.3.I FL.3.J SBZ
10 SML.1 FL.3.K FL.3.L FL.3.M SML.0 FL.4.A FL.4.B SBZ FL.4.C FL.4.D FL.4.E FL.4.F FL.4.G MTL FL.4.H SBZ
12 FL.4.I FL.4.J BUSYL FL.4.K FL.4.L FL.4.M U? SBZ FL.5.A FL.5.B FL.5.C FL.5.D FL.5.E FL.5.F FL.5.G SBZ
14 U? FL.5.H FL.5.I FL.5.J U? FL.5.K FL.5.L SBZ FL.5.M U? U? U? U? U? U? SBZ
16 U? U? PMR FR.0.DP SMR.8 FR.0.A FLR.0.B SBZ FR.0.C FR.0.D FR.0.E FR.0.F FR.0.G PLR FR.0.H SBZ
18 FR.0.I FR.0.J SMR.7 FR.0.K FR.0.L FR.0.M SMR.6 SBZ FR.1.A FR.1.B FR.1.C FR.1.D FR.1.E FR.1.F FR.1.G SBZ
20 A? FR.1.H FR.1.I FR.1.J SMR.5 FR.1.K FR.1.L SBZ FR.1.M SMR.4 FR.2.A FR.2.B FR.2.C FR.2.D FR.2.E SBZ
22 FR.2.F FR.2.G A? FR.2.H FR.2.I FR.2.J SMR.3 SBZ FR.2.K FR.2.L FR.2.M U? U? U? U? SBZ
24 FR.3.DP A? SMR.2 FR.3.A FR.3.B FR.3.C FR.3.D SBZ FR.3.E FR.3.F FR.3.G A? FR.3.H FR.3.I FR.3.J SBZ
26 SMR.1 FR.3.K FR.3.L FR.3.M SMR.0 FR.4.A FR.4.B SBZ FR.4.C FR.4.D FR.4.E FR.4.F FR.4.G MTR FR.4.H SBZ
28 FR.4.I FR.4.J BUSYR FR.4.K FR.4.L FR.4.M KEY2 SBZ FR.5.A FR.5.B FR.5.C FR.5.D FR.5.E FR.5.F FR.5.G SBZ
30 SET FR.5.H FR.5.I FR.5.J LOCK FR.5.K FR.5.L SBZ FR.5.M U? U? U? U? U? U? SBZ
32 MAINR TXR PLUSR MINUSR ENCR DEC R PMSR SBZ SKIPR CR.0.C CR.0.B CR.0.G CR.0.A CR.0.E CR.0.F SBZ
34 CR.0.D CR.2.D CR.1.C CR.1.B CR.1.G CR.1.A CR.1.E SBZ CR.1.F CR.1.D CR.DSH CR.2.C CR.2.B CR.2.G CR.2.A SBZ
36 CR.2.E CR.2.F MAINL TXL PLUSL MINUSL ENCL SBZ DECL PMSL SKIPL CL.0.C CL.0.B CL.0.G CL.0.A SBZ
38 CL.0.E CL.0.F CL.0.D A? CL.1.C CL.1.B CL.1.G SBZ CL.1.A CL.1.E CL.1.F A? U? U? U? SBZ
40 U? U? CL.2.C CL.2.B CL.2.G CL.2.A CL.2.E SBZ CL.2.F CL.2.D U? U? U? U? U? SBZ


Documentation

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