National Instruments SCXI-1163 - Manual (Page 44)

Chapter 3 Theory of Operation
© National Instruments Corporation 3-5 SCXI-1163 User Manual
This circuitry is divided into an SCXI digital interface section and two signal routing sections.
The SCXI digital interface buffers signals from the SCXIbus to the module and drives signals
from the module onto the SCXIbus.
The rear connector routing circuit determines the function of the rear connector from the jumper-
configured primary operating mode. When the primary operating mode is serial, the signals from
the rear connector are routed to the SCXI digital interface. When the primary operating mode is
parallel, the signals from the rear connector are routed to the data router.
The data routing circuit determines the output mode of operation from the Address Handler and
registers. When the output mode is set to serial, the outputs get their signals routed from the
Data Register. When the output mode is set to parallel, the outputs get their signal routed from
the rear connector circuit. Notice that, because the rear connector signals are not routed to the
data routing circuit when the primary mode of operation is serial, the output mode of operation
cannot be parallel when the primary mode is set to parallel. For additional descriptions of
primary and output modes of operation, see Chapter 4,
Register Descriptions .
Register Circuitry
Figure 3-4 diagrams the SCXI-1163 register circuitry.
Serial Data In
Address Handler
Digital Control Signals
Ouput Mode
Register
Primary Mode
Status
Data Register
Module ID
Register
Serial Data Out
Output Mode Select
Data to Output Routing Circuit
Figure 3-4. SCXI-1163 Register Circuitry