Specifications

Danish Interpretation Systems Technical Specifications
Printed in Denmark
45
5.2.1 Power up of the CU after connecting
When the connection to the CU is done prior to putting power on the CU, the external control unit will
receive start up information from the CU at power up, the ‘CU reset’ message. This is the initial
message indicating, that the CU is powered up.
In order for the external control unit to be able to control the microphone functionality of the CU, it is
necessary to make the CU enter the binary microphone control mode. Furthermore, the external control
unit must perform a registration in the CU.
The following sequence shows, how the start up and registration takes place:
External
Control Unit
CU
Change binary control Mode
Change binary control ModeChange binary control Mode
Change binary control Mode
<START> 'm' <ID> 'c' 'm' <CRC> <STOP>
Controller Address
Controller AddressController Address
Controller Address
<START> 'c' <ID> <15> <173> <27>
<4> <2> <New Addr MSB> <New Addr LSB>
<Ext. ID> <CRC> <STOP>
CU Reset
CU ResetCU Reset
CU Reset
<START> 'r' <ID> <CRC> <STOP>
ASCII Text
ASCII TextASCII Text
ASCII Text
'Loading....'
After the binary 'CU reset' message,
the CU sends a stream of ASCII text.
Notice, the text does not include
any <START> and <STOP>
indications.
All ASCII text is to be disregarded.
The CU is directed to the
microphone control mode.
Register External controller
Register External controllerRegister External controller
Register External controller
<START> 'j' <ID> <0> <15> <173> <27>
<2> <1> <Ext. ID> <CRC> <STOP>
Registration is initiated by the
external control unit.
The CU confirms the registration by
returning an address to the external
control unit.
The CU initiates communication by
a 'CU reset' message.
Figure 1 - Start up and registration