Chapter 4 Signal Connections

National Instruments Corporation 4-15 AT-MIO/AI E Series User Manual

PFI5/UPDATE* DIO — Vcc +0.5 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
PFI6/WFTRIG DIO — Vcc +0.5 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
PFI7/STARTSCAN DIO — Vcc +0.5 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
PFI8/GPCTR0_SOURCE DIO Vcc +0.5 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
PFI9/GPCTR0_GATE DIO — Vcc +0.5 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
GPCTR0_OUT DO 3.5 at (Vcc -0.4) 5 at 0.4 1.5 50 k pu
FREQ_OUT DO 3.5 at (Vcc-0.4) 5 at 0.4 1.5 50 k pu
1DIO <6..7> are also pulled down with a 50 k resistor.
AI = Analog Input DIO = Digital Input/Output pu = pullup
AO = Analog Output DO = Digital Output
Note: The tolerance on the 50 k pullup and pulldown resistors is very large. Actual value may range between
17 k and 100 k.
Table 4-4. I/O Signal Summary, AT-MIO-16XE-50 (Continued)
Signal Name Drive Impedance
Input/
Output
Protection
(Volts)
On/Off
Source
(mA at V) Sink
(mA at
V)
Rise
Time
(ns)
Bias