Register Descriptions
Chapter 4
SCXI-1162 User Manual
4-6
© National Instruments Corporation
Slot 0 Register Descriptions
Slot 0 has three registers–the FIFO Register, the Hardscan Register and the Slot-Select Register.
Only the Slot-Select Register is relevant to this module. The Slot-Select Register is a 16-bit,
write-only register that determines with which slot the data acquisition board speaks when
SLOT0SEL* is released high. In the case of the SCXI-1001 chassis, the Slot-Select Register
also determines in which chassis the desired slot is. Write to the Slot-Select Register using the
SLOT0SEL* line. Maintain software copies of the Slot-Select Register.
If you are using multiple chassis, it is important to understand the architecture of the Slot-Select
Register. Although each chassis has its own physical Slot-Select Register, all are written to at
the same time. The jumper settings in Slot 0 of a chassis determine with which chassis number
Slot 0 is identified. From the software perspective, only one Slot-Select Register exists in a
system composed of multiple chassis.