ADLINK PXI-2208 - Manual (Page 22)

10 Introduction
General Purpose Digital I/O (G.P. DIO, 82C55A)
X
Channels: 24 programmable input/output
X
Compatibility: TTL
X
Input voltage:
Z
Logic Low: VIL=0.8 V max; IIL=0.2 mA max
Z
High: VIH=2.0 V max; IIH=0.02 mA max
X
Output voltage:
Z
Low: VOL=0.5 V max; IOL=8 mA max
Z High: VOH=2.7 V min; IOH=400 µA
X Synchronous Digital Inputs (SDI): On DAQ-/DAQe-/PXI-
2204 model only.
Z
Channels: 8 digital inputs sampled simultaneously with
the analog signal input
Z
Compatibility: TTL/CMOS
Z
Input voltage:
Logic Low: VIL=0.8 V max; IIL=0.2mA max
Logic High: VIH=2.7 V min; IIL=0.02mA max
General Purpose Timer/Counter (GPTC)
NOTE The DAQ-/DAQe-/PXI-2208 does not support this func-
tion.
X
Channels: 2 independent up/down timer/counters
X
Resolution: 16-bit
X
Compatibility: TTL
X
Clock source: Internal or external
X
Max source frequency: 10 MHz