National Instruments DIO 6533 User Manual page 48

Pins Signal Name
40 CPULL
38 DPULL
1 +5 V
11, 14, 18, GND
20, 24, 27,
30, 33, 36–
37, 41–42,
46, 49–50,
55, 59, 62,
65, 68
19, 35, 43, RGND
56
© National Instruments Corporation
Table 4-1. Signal Descriptions (Continued)
Signal Type
Bias Control pull-up/pull-down selection—This input
Selection signal selects whether the 6533 device pulls the
timing and handshaking control lines (REQ,
ACK, PCLK, and STOPTRIG) up or down when
undriven. If you connect CPULL to +5 V, the
6533 device pulls the control lines up. If you
connect CPULL to GND or leave CPULL
unconnected, the 6533 device pulls the control
lines down.
Bias Data pull-up/pull-down selection—This input
Selection signal selects whether the 6533 device pulls the
data lines (DIOA, DIOB, DIOC, and DIOD) up
or down when undriven. If you connect DPULL
to +5 V, the 6533 device pulls the data lines up.
If you connect DPULL to GND or leave DPULL
unconnected, the 6533 device pulls the data lines
down.
Power 5 Volts, output—This line provides a maximum
of 1 A of power, regulated by an onboard fuse
that can automatically reset itself after current
returns to normal.
Power Ground—These lines are the ground reference
for all other signals.
Power Reserved ground—These lines offer additional
ground pins that vary in connection from cable to
cable. With an R6868 ribbon cable, you can use
these lines as additional ground references. With
an SH68-68-D1, however, these signals are not
connected.
4-5
Chapter 4 Signal Connections
Description
DIO 6533 User Manual