Hardware

From OpenTom

Some general Information about the hardware:

1 General Info
2 Open the box
3 Preliminary info about 910
4 Module Information
5 Components
6 Chips on the original PCB
7 Photos

General Info

The GO seems to be originally developed by Mistral Software Pvt. Ltd., located in Bangalore, India. They have a Smart Handheld Design that basically is a TTGO without GPS and accelerometer. It is assumed that those two components were added on contract for TomTom B.V..

[edit]

Open the box

To open your TomTom Go, first remove the front cover. After that you can remove four Torx T8 screws. You need a real Torx screwdriver to get the screws removed. Torx bits won't fit into the holes. You can get a matching screwdriver at Reichelt Electronics in Germany. The CK brand of tools in the UK are also good for this

GO300 dismantled

To open a 910 (and supposedly 710 and 510 too), first remove the front cover. Then remove the 4 Torx screws (they're T6 screws) located under the ends of the long rubber pads at the bottom of the unit. Push gently from the mount hole near the connector, and the inside will move out.

[edit]

Preliminary info about 910

All the major chips in 910 are protected by metal housing, making their inspection tedious.

The reset switch seems to be located next to the connector. There is a corresponding small hole in the housing. One can use a clip pin to press the button.

[edit]

Module Information

Connectors in general, including some preliminary info about TomTom 910
Framebuffer
Serial Console
GPS unit
Accelerometer
Sound chip
Watchdog
Battery and power management
TFT LCD Display
Real Time Clock in hardware
Touch Screen
Universal Serial Bus - client and host modes
General Purpose Input/Output

[edit]

Components

Screen *

Samsung LTE400WQ-E01-005, http://www.samsung.com/Products/TFTLCD/Others/LTE400WQ/LTE400WQ.htm

or NEC NL2432HC22-25E - [TomTom GO300]

Harddisk *

Hitachi HTC426020G5CE00

[edit]

Chips on the original PCB

ARM SAMSUNG S3C2410X01
- ARM920 based MCU
- Datasheet
- ARM920 Manual
- ARM Architecture Reference Manual, unfortunately not available as PDF online. You can either buy the printed book, or order the ARM Technical Publications CDROM (free).

NEC L5028223K1
- Clock generator for TFT (sold with TFT)

MAXIM MAX1747
- Triple Charge-Pump TFT LCD DC-DC Converter
- Datasheet

Philips TDA8543T
- 2W BTL Audio Amplifier
- Datasheet

WM8711L
- Low Power Audio DAC with Headphone Driver and Line Input
- Datasheet

Samsung K4S2816330 (two times)
- Mobile SDRAM - dual 16bit devices to provide 32bit data path
- 32 MBytes total
- Samsung Mobile SDRAM part number decoder
- Product Family datasheets