Rtsi Bus Clock Selection; Hardware Installation; Table 2-14. Configurations For Rtsi Bus Clock Selection - National Instruments AT-MIO-16 User Manual

Chapter 2

RTSI Bus Clock Selection

When multiple AT Series boards are connected via the RTSI bus, you may want all the boards to
use the same 10 MHz clock. This arrangement is useful for applications that require
counter/timer synchronization between boards. Each AT Series board with a RTSI bus interface
has an onboard 10 MHz oscillator. Thus, one board can drive the RTSI bus clock signal, and the
other boards can receive this signal or disconnect from it.
The configuration for jumper W5 specifies whether a board is to drive the onboard 10 MHz
oscillator onto the RTSI bus, receive the RTSI bus clock, or disconnect from the RTSI bus clock.
This clock source, whether local or RTSI signal, is then divided by 10 and used as the Am9513A
frequency source. The jumper selections are shown in Table 2-14.

Table 2-14. Configurations for RTSI Bus Clock Selection

Local Clock
Use the local oscillator as
the board clock (factory
setting)
W5

Hardware Installation

You can install the AT-MIO-16 in any available 16-bit expansion slot (AT style) in your
computer. The AT-MIO-16 does not work if installed in an eight-bit expansion slot (PC style).
After you have changed (if needed), verified, and recorded the switches and jumper settings, you
are ready to install the AT-MIO-16. The following are general installation instructions, but
consult your PC AT user manual or technical reference manual for specific instructions and
warnings.
1. Turn off your computer.
2. Remove the top cover or access port to the I/O channel.
3. Remove the expansion slot cover on the back panel of the computer.
© National Instruments Corporation
Slave Clock
Receive the RTSI bus clock
signal
W5
2-17
Configuration and Installation
Master Clock
Drive the RTSI bus clock
and the board clock signal
with the local oscillator
W5
AT-MIO-16 User Manual