FT-8800R tech documentation
From Interlock Rochester Wiki
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Technical
Pinouts
| 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 |
| 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
| 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.
| 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
| 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
| 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
| SBZ | ||||||
| 9 | Panel right-side (multiplexed) buttons
| SBZ | ||||||
| 10 | Panel left-side (multiplexed) buttons
| SBZ | ||||||
| 11 | SET key | SBZ | ||||||
| 12 | Hyper-memory key
| |||||||
| Octet | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0 | U? | APO | PML | FL.0.DP | 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 | A? | FL.1.H | FL.1.I | FL.1.J | SML.5 | FL.1.K | FL.1.L | SBZ |
| 4 | FL.1.M | SML.4 | FL.2.A | FL.2.B | FL.2.C | FL.2.D | FL.2.E | SBZ | FL.2.F | FL.2.G | A? | FL.2.H | FL.2.I | FL.2.J | SML.3 | SBZ | ||||||||
| 6 | FL.2.K | FL.2.L | FL.2.M | U? | U? | U? | U? | SBZ | FL.3.DP | A? | SML.2 | FL.3.A | FL.3.B | FL.3.C | FL.3.D | SBZ | ||||||||
| 8 | FL.3.E | FL.3.F | FL.3.G | A? | FL.3.H | FL.3.I | FL.3.J | SBZ | SML.1 | FL.3.K | FL.3.L | FL.3.M | SML.0 | FL.4.A | FL.4.B | SBZ |
