User's Manual

Doc. No.
Rev.
Date
1.00
2011-12-08
Damm Cellular Systems A/S, Denmark
TETRAFLEX
®
V7.5 MANUAL - TR412 Transceiver Description
TetraFlex® 7.5 Manual 4-21
4.4.6 Micro Controller
The MC is handling the over-all administration of the TR412.
The MC is provided with 1024kByte segmented FLASH memory, containing all the code for
the MC as well as for the DSP. One segment contains the boot program, which is used
during start-up and software download from the BSC. A 50-pin connector inside the TR412
allows the insertion of an external boot card, which is needed to update the internal boot
section. Two segments of the FLASH memory are used to save the factory and system
configuration of the TR412.
One of the MC’s internal HDLC controllers is used to communicate with the BSC via the
HDLC bus and carries all message type communication with the BSC, including TETRA
messages, packed-type voice and date, O&M and house-keeping.
Its UART is connected to the UART bus giving an alternative way of O&M communication.
The MC is provided with a watchdog, which will make a restart of the TR at improper
operation of the software.