Measurement Computing USB-3110 - Manual (Page 21)

USB-3110 User's Guide Specifications
21
Counter
Table 8. CTR I/O specifications
Parameter Conditions Specification
Pin name CTR
Number of channels 1
Resolution 32-bits
Counter type Event counter
Input type TTL, rising edge triggered
Counter/timer read/writes rates
(software paced) Counter read System dependent, 33 to 1000 reads per second.
Counter write System dependent, 33 to 1000 reads per second.
Schmidt trigger hysteresis 20 mV to 100 mV
Input leakage current ±1.0 µA typ.
Input frequency 1 MHz max.
High pulse width 500 nS min.
Low pulse width 500 ns min.
Input high voltage 4.0 V min, 5.5 V absolute max
Input low voltage 1.0 V max, –0.5 V absolute min
Memory
Table 9. Memory specifications
EEPROM 256 bytes
EEPROM configuration Address range Access Description
0x000-0x0FF Read/write 256 bytes user data
Microcontroller
Table 10. Microcontroller specifications
Type High performance 8-bit RISC microcontroller
Program memory 16,384 words
Data memory 2,048 bytes
Power
Table 11. Power specifications
Parameter Conditions Specification
Supply current USB enumeration < 100 mA
Supply current (Note 8) Quiescent current 160 mA typ.
+5V user output voltage range (Note 9) Available at terminal block pin 56 4.5 V min, 5.25 V max.
+5V user output current (Note 10) Available at terminal block pin 56 10 mA max.
AC Power Adapter Requirements (Note 11)
Output voltage 5V, ±5%
Output wattage 10 watts
Power jack configuration Two conductor
Power jack barrel diameter 6.3 mm
Power jack pin diameter 2.0 mm
Power jack polarity Center positive