Project HP F4480 Pen Controller
HP F4480 Pen Controller
This page documents my investigations into the wire protocols of the HP F4480 Pen Controller.
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HP CB8605-60085 Printer Carriage Pinout
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HP F4480 Breakout Cable
Suspected Pinout
The nominal voltages recorded on the flex cable are in the following table, along with the disconnect results from my breakout cable:
| Pin | Voltages | Dir | Name | Comment |
|---|---|---|---|---|
| 1 | 0.0v | Out | ENC_A | Encoder A Output |
| 2 | 0.0v | Out | ENC_B | Encoder B Output |
| 3 | 0.0v | Gnd | GND | Ground |
| 4 | 1.6v | In | CYM Ink Control | |
| 5 | 0.0v / 0.9v / 1.1v | In | CYM Ink Control | |
| 6 | 0.0v | Gnd | GND | Ground |
| 7 | 0.0v / 1.5v | ? | Disconnect - No effect | |
| 8 | 0.0v / 1.5v | ? | Disconnect - Immediate stop of printing | |
| 9 | 0.0v | Gnd | GND | Ground |
| 10 | 1.6v | In | #BK_DATA | Black Ink Control (Looks like data, I guess) |
| 11 | 1.1v / 0.9v / 0.0v | #BK_EN | Black Ink Control (110us off, 1.6us on) | |
| 12 | 0.0v | Ground | GND | Ground |
| 13 | LVCMOS3.3 | Out | INK | Ink eject (1.5us pulse) |
| 14 | LVCMOS3.3 | In/Out | IO_DATA | Disconnect - immediate stop of print, E - Ink |
| 15 | 3.3v | Vcc | VCC | 3.3v for logic |
| 16 | LVCMOS3.3 | Out | IO_CLK | Disconnect - immediate stop of print, no error |
| 17 | 16v | In | VINK | Voltage for ink jet |
| 18 | 16v | In | VINK | Voltage for ink jets |
| 19 | 16v | In | VINK | Voltage for ink jets |
| 20 | 16v | In | VINK | Voltage for ink jets |
NOTE: IO_DATA appears to update for sampling on both positive and negative edges of IO_CLK, IO_CLK is 4Mhz, and nominally low when idle.
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Pin 10 Waveforms
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Pin 11 Waveforms
I have a tarball of some waveform dumps, in CSV and VCD (GtkWave) formats: HP-F4480-Pen-Controller.zip