Hardware Connectors
From OpenTom
Contents |
TomTom GO Classic
There are three Connectors on the bottom of the device.
On the image you can see:
- GPS Antenna Connector (RF)
- two 10pin Headers (A[1..10] and B[1..10])
Pinout
| Pin | Signal | Dir | Type | Description |
|---|---|---|---|---|
| A01 | TxD | OUTP | UART | 3V logic level UART0 signal |
| A02 | RxD | INP | UART | 3V logic level UART0 signal |
| A03 | RTS | OUTP | UART | 3V logic level UART0 signal |
| A04 | CTS | INP | UART | 3V logic level UART0 signal |
| A05 | GND | - | PWR | Signal and power GND |
| A06 | TEST0 | - | RST_DOCK | Production test signals |
| A07 | TEST1 | - | JTAG-TMS | Production test signal (TomTom Go resets when this pin is pulled to ground and released again) |
| A08 | TEST2 | - | JTAG-TCK | Production test signal |
| A09 | TEST3 | - | JTAG-TDI | Production test signal |
| A10 | TEST4 | - | JTAG-TDO | Production test signal |
| B01 | GND | - | PWR | Signal and power GND |
| B02 | GND | - | PWR | Signal and power GND |
| B03 | DOCKSNS1 | INP | Pullup resistor within TTGO | Docking Station Sense |
| B04 | DOCKSNS0 | INP | Pullup resistor within TTGO | Docking Station Sense (the docking station pulls either or both pins to ground to indicate presence and type of docking station) |
| B05 | AUDIOL | OUTP | Audio out left | |
| B06 | AUDIOR | OUTP | Audio out right | |
| B07 | MUTE | OUTP | Open Drain | TTGO pulls this line to GND to signal car audio system mute |
| B08 | IGNITION | INP | Pull-Down resistor within TTGO | Ignition sense |
| B09 | DOCKPWR | INP | Power | +5V power from the docking station |
| B10 | DOCKPWR | INP | Power | +5V power from the docking station |
At this time we have not found a source for matching plugs. We're currently using homemade ones.
Some people are creative enough to build their own Docking station.
Note that pin 1/2/3 are on GND when used on a power-only docking station
Original configuration for the dock was B3 on GND and B4 unused (as shown
on the wiki page http://wiki.opentom.org/index.php/Image:Tompower.jpg).
After putting both (B3 and B4) to GND, the ignition sense worked as
expected. Turn on/off display depending on ignition.
Ignition sense (pin B8) should be connected to +12V in order to turn the device on. Interposing a 10kohm resistor between pin B8 and +12V (ignition) should work fine. While some instants are needed in order to switch on the device when connecting +12V to pin B8, the switch down (by disconnecting pin B8) is immediate.
TomTom Go 300/500/700 Connector
The TomTom Go 500/700 has a single 15 pin connector on the base.
The TomTom Go 300 also has this single 15 pin connector, the same functionality, but minus microphone.
Pinout
- (Far right looking at shoe) - Ground
- Docking Sense (This seems to be pulled to ground to symbolise a powered docking shoe.)
- Docking Sense (This seems to be pulled to ground to symbolise a permanent docking kit, mute radio etc.)
- Microphone
- Left Audio
- Right Audio
- Mute Radio (This gets pulled to ground by the TomTom to mute the radio, surprisingly it seems fine to shove 12v up this pin)
- Car Lights Sense (Is pulled to ground to switch modes, unconfirmed! Also appears not to work from v5.? up.)
- Spare/Future Expansion?
- TxD
- RxD
- RTS
- CTS
- Unknown (3.3v output?)
- Power +5V
Action
Upon the TomTom pulling mute to ground the PDK (Docking Kit) will: Switch the front speakers to be the output of the onboard amplifier and amplify the output from the TomTom; Switch the back speakers to mute.
The handsfree from the TomTom only appears on the left channel, this I believe is within the TomTom software.
Initial connector diagram.
^^ Note that Pins 8 & 9 of this connector are outputs from an ARM7 microcontroller IC. Although grounding of pin 8 causes the unit to switch over to NightView, it does so by forcing the output low causing that output to source around 50mA into a short-circuit, possibly stressing the IC.
TomTom Go 510/710/910 Connector
Uses a different docking station from 300/500/700. Pinouts unknown.
ONE Version 3
The audio jack on ONE Version 3 also doubles as serial port.
GO X40 Live
The '40 series uses a new 20 pin "Active Cradle" connector. All connections to the device are through this one connector - there are no separate usb/audio/aerial connectors at all. (Feel free to map them... although I'm hoping to make a start soon - it'll be easier for someone who has one of the really Active beta release cradles...)
GO x50
The x50 series uses the 20 pin "Active Cradle" connector. All connections to the device are through this one connector. USB signals and power are used for the computer connector (USB-A to "Active Cradle"), and the window mount cradle uses a cig. lighter adaptor to USB-mini-B to provide power.
Other models
Most other models only have USB and GPS anntenna connectors.
