Fundamental Technologies

Cassini MIMI Pages

Memory Map of EPU

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Memory Map of CPU

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EPU Interrupts

Normal Mode of Operation

NMI CPU Watchdog timer time-expired
E11   
E12 Commun. Port (CPU to EPU Command or Data available)
E13 Test Port Interrupt (Bus B)
E14 CHEMS data available
E15 INCA data available

Backup Mode of Operation

NMI  
E11 BIU Interrupts *
E12 Housekeeping data available and LEMMS interrupts **
E13 Test Port Interrupt (Bus B)
E14 CHEMS data available
E15 INCA data available

* BIU Interrupts: RTI, DTSTART, BIU_STDINTn, BIU_BCRTF, WD_XPIRD, WP_VILTN
** LEMMS Interrupts: Sensor data available, STP_CKL_ECHO, ABS_POS

CPU Interrupts

Normal Mode of Operation

NMI EPU Watchdog timer time-expired
E11 BIU Interrupts *
E12 Commun. Port (EPU to CPU Command or Data available)
E13 Test Port Interrupt (Bus A)
E14 Housekeeping data available and LEMMS interrupts **
E15  

Backup Mode of Operation

NMI  
E11 BIU Interrupts *
E12 Housekeeping data available and LEMMS interrupts **
E13 Test Port Interrupt (Bus A)
E14 CHEMS data available
E15 INCA data available

* BIU Interrupts: RTI, DTSTART, BIU_STDINTn, BIU_BCRTF, WD_XPIRD, WP_VILTN
** LEMMS Interrupts: Sensor data available, STP_CKL_ECHO, ABS_POS

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Updated 6/17/08, T. Hunt-Ward
tizby@ftecs.com