National Instruments SCXI-1163 - Manual (Page 47)

© National Instruments Corporation 4-1 SCXI-1163 User Manual
Chapter 4
Register Descriptions
This chapter describes in detail the SCXI-1163 Address Handler, the Module ID Register, the
Data Register, the Status registers, and the SCXI-1000/1001 Slot 0 registers.
Note: If you plan to use a programming software package such as NI-DAQ, LabWindows, or
LabVIEW with your SCXI-1163 board, you do not need to read this chapter.
Register Description
Register Description Format
This register description chapter discusses each of the SCXI-1163 registers and the Slot 0
registers. A detailed bit description of each register is given. The individual register description
gives the type, word size, and bit map of the register, followed by a description of each bit.
The register bit map shows a diagram of the register with the MSB shown on the left (bit 31 for a
32-bit register, bit 15 for a 16-bit register, bit 7 for an 8-bit register), and the LSB shown on the
right (bit 0). A rectangle is used to represent each bit. Each bit is labeled with a name inside its
rectangle. An asterisk (*) after the bit name indicates that the bit is inverted (negative logic).
The Module ID register has a unique format and is described in the
Module ID Register section.
In many of the registers, several bits are labeled with an X, indicating don't care bits. When you
write to a register, you may set or clear these bits without effect.
SCXI-1163 Registers
The SCXI-1163 has an address handler that chooses one of the following five registers. The
Address Handler is a write-only register that contains the address of the register to be read from
or written to. The Module ID Register is a 4-byte read-only register that contains the Module ID
number of the SCXI-1163. The Data Register is a 32-bit write-only register that controls the
output states on the SCXI-1163. The Status registers are 1-bit registers that indicate the mode of
operation of the module–serial, parallel, or serial override. The Parking Register is a dummy
register located at address FFFF.