JYTEK USB-62401, User Manual

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Introduction 7
1.4.4 Digital Input/Output
Thermocouple 107.9735725 143.46202 198.49927 202.17693
2-wire RTD 44.53668125 77.870435 71.369319 127.45831
3-wire RTD 42.00570563 87.738238 72.70806 123.21166
4-wire RTD 72.2785775 155.50389 72.168651 123.65813
2-wire resistance 72.76746238 153.9091 71.566314 122.28421
I/O Specifications
Number of channels 4-CH programmable function digital input (DI)
2-CH programmable function digital output
(DO)
Compatibility TTL (single-end) (supports 3.3V and 5 V DI but 3.3V
DO)
Input voltage Logic low: VIL = 0.8 V max; IIL = 0.2 mA max.
Logic high: VIH = 2.0 V min.; IIH = 0.2 mA max.
Output voltage Logic low: VOL = 0.5 V max; IOL = 10 mA max.
Logic high: VOH = 2.6V min.; IIH = 10 mA max.
Supporting modes (only one
can be selected and function
at the same time, please see
Section 4.6: Programmable
Function I/O)

4-CH TTL DI and 2-CH TTL DO

1-CH 32-bit general-purpose
timer/counters:

Clock source: internal or exter -
nal

Max source frequency: inter -
nal: 80 MHz; external: 10 MHz

1-CH PWM outputs:

Duty cycle:1-99% (please see
Section 4.6.3: Mode 10: PWM
Output) Modulation fre -
quency: 20 MHz to 0.005Hz
Data transfers Programmed I/O
Mode Sampling Rate (SPS)