Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 86 of 92 21.12.2001
7 Updating Firmware
The TC35 firmware is stored in a Flash memory. This gives you the flexibility to easily
upgrade to the latest firmware releases. The firmware is supplied as a Windows executable
that can be downloaded onto the GSM engine using the serial interface of its ZIF connector
or the SIM interface.
To meet the requirements of various application platforms there are a number of ways to
perform the update. This chapter summarizes the options currently available. For detailed
information, step-by-step instructions and possibly implied modifications to the hardware
design please refer to the "Firmware Updating User's Guide", /3/.
Updating the firmware over the serial interface
• The download procedure uses the TXD0, RXD0 and IGT lines of the ZIF connector and
the TXD, RXD and DTR lines of the host application (MMI) or the PC's serial port. The
approach to set up the serial link depends very much on the individual design of the host
application. The "Firmware Updating User's Guide" recommends the following methods:
1. Download over DSB35 Support Box (evaluation kit).
2. Download over service interface and service connector with the download being
supported by firmware executable.
3. Download controlled by the processor of the host application (MMI processor).
Updating the firmware over the SIM interface
• This solution is recommended when your GSM application has no direct access to a
serial interface. To transfer the software to the device you will need the BB35 Bootbox. It
comes with a specific adapter that connects the SIM card reader of your TC35
application to your computer's serial port.
In either case, the firmware executable runs on any computer under Windows 98, Windows
NT 4.0, Windows 2000, Windows ME, Windows XP (except for Windows 95 which supports
only the serial interface option).