GLAST/LAT > DAQ and FSW > FSW

LAT Unit Identification


The LAT will use the following unit identification codes for external communications (via the 1553 bus) and internal communications (via the LATp bus):

LAT Unit Identification Codes
LAT Unit Description LATp ID
Not Applicable SIU(ext): SIU test port. 0x11 (TBR)
0x0 SIU(0): The SIU designated as unit 0. The LAT unit identifier of 0x0 will be used to address the active SIU on the 1553 bus. SIU 0 is active if it is the SIU that is responsive on the 1553 bus. The LATp address for SIU(0) is unique from SIU(1) and is designated as ID 18. 0x12
SIU(1): The SIU designated as unit 1. The LAT unit identifier of 0x0 will be used to address the active SIU on the 1553 bus. SIU 1 is active if it is the SIU that is responsive on the 1553 bus. The LATp address for SIU(1) is unique from SIU(0) and is designated as ID 19. 0x13
0x1 EPU(0): EPU designated as unit 0. 0x14
0x2 EPU(1): EPU designated as unit 1. 0x15
0x3 EPU(2): EPU designated as unit 2. 0x16
0x6-0xF Not Assigned Not Applicable