Req. 5.3.1.4.2: "SIU Reboot Signal from SC"

The SIU shall respond to a discrete signal line from the SC by performing a hardware reboot.

Basis (help)

[2] (3.2.5.3.3)

2: "LAT Instrument - Spacecraft Interface Requirements Doc." (NASA 433-IRD-0001)

3.2.5.3.3: "Discrete Control Signals"

The SC shall provide 8 primary and 8 redundant discrete LVDS signals for configuration and power control of the LAT. The LAT shall provide and install all associated actuators and wiring that attach to the LAT. Each set of primary and redundant signals shall be 2 pulse and 6 levels.

Context (help)

Test(s)

009b: FSW and LAT re-initialization and recovery

This test shall verify the mechanisms for recovery should the LAT or one of its processors become non-operational or lose communications, either internally or with the SC. This test shall include a number of scenarios: orderly shut-down and re-initialization of LAT when communications with SC are lost, reboot of the SIU on receipt of the SIU_RESET discrete signal from the SC, re-initialization of the SIU by the watchdog function, re-initialization of one or more EPUs by the SIU or when the EPU watchdog function is triggered.