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Network Card User Manual

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Register Descriptions Chapter 4
SCXI-1163 User Manual 4-8 © National Instruments Corporation
Slot-Select Register
The Slot-Select Register contains 16 bits that determine which module in which chassis is
enabled for communication when the SLOT0SEL* line is high. An SCXI-1000 chassis selects
the appropriate module in its chassis, regardless of the chassis number written. The Slot-Select
Register shifts in the data present on the MOSI line, bit 15 first, when SLOT0SEL* is low.
Type: Write-only
Word Size: 16-bit
Bit Map:
15 14 13 12 11 10 9 8
X X X X X X X CHS4
76543210
CHS3 CHS2 CHS1 CHS0 SL3 SL2 SL1 SL0
Bit Name Description
15-9 X Don't care bits – Unused.
8-4 CHS<4..0> Chassis Bit 4 through 0 – Determine which chassis is
selected. On the SCXI-1000 chassis, these are don't care
bits.
3-0 SL<3..0> Slot Bit 3 through 0 – Determine which slot in the selected
chassis is selected.