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8 Firmware updates
Whenever the on-board software must be upgraded or modied, the new rmware can be downloaded to the
internal ash memory via the radio clock's serial port COM0. There is no need to open the computer case and
insert a new EPROM.
If the button behind a hole in the rear slot cover is pressed for approximately 2 seconds, a bootstrap loader
is activated and waits for instructions from the serial port COM0. A loader program shipped together with the
le containing the image of the new rmware sends the new rmware from one of the computer's serial ports to
the clock's serial port COM0. The bootstrap loader does not depend on the contents of the ash memory, so if
the update procedure is interrupted, it can easily be repeated.
The contents of the program memory will not be modied until the loader program has sent the command
to erase the ash memory. So if the button has been pressed accidentally, the system will be ready to operate
again after the computer has been turned o and then on again.
GPS170PCI
Date: 12th July 2012
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