Technical data

Product Specification
HIF-2121/R5 CAGE CODE: 97896 SCALE: NONE SIZE: A DWG NO: 965-1176-601 REV: D SHEET 144
After being written to EEPROM, the configuration module data will be read back. If this data fails the 32-bit CRC it will be
taken to indicate the data write to the EEPROM failed, and the write process shall be restarted for up to four attempts.
After programming the memory locations, the EEPROM will be read per section 6.10.15.2 to confirm a successful data
transfer to the configuration module occurred. After confirmation of the data integrity in the configuration module the
EGPWS shall be rebooted to ensure that the EGPWS NVM is updated with the new configuration information.
6.10.15.4 Configuration Module Write (CUW)
The EGPWS requires a string of configuration information to be written to the configuration module memory when requested
from the keyboard monitor.
The user input string to be written to the configuration module will be checked using a 32-bit CRC prior to being written to
the configuration modules EEPROM. For the CUW command, this CRC is generated by the EGPWS rather than the user.
This string would read for example:
CUW0/14056001300000000/
Where the first zero reflects the sting version, the next number is the number of categories and the remaining numbers before
the second separator reflect the ID for each of the categories.
After being written to EEPROM, the configuration module data will be read back. If this data fails the 32-bit CRC it will be
taken to indicate the data write to the EEPROM failed, and the write process shall be restarted for up to four attempts.
After programming the memory locations, the EEPROM will be read per section 6.10.15.2 to confirm a successful data
transfer to the configuration module occurred. After confirmation of the data integrity in the configuration module the
EGPWS shall be rebooted to ensure that the EGPWS NVM is updated with the new configuration information.
6.10.15.5 Configuration Module Faults
The configuration module will set faults associated with the read and write processes and also relating to the information
contained in memory.
If the configuration module is present but contains no data, then the configuration module is indicated to be unprogrammed. If
there is also no last valid NVM configuration (new box), then the system will configure to a zero default configuration.
If the number of categories present in the configuration module is more than the number expected by the software this will be
faulted. If the number of categories present in the configuration module is less than the number expected by the software then
the extra categories will be set to zero in NVM.
Note: Where there are less categories than expected in the configuration module, the configuration module will not have these
categories added automatically. It is required that the user update the configuration module with this extra information.