Counter; Memory; Microcontroller - Measurement Computing USB-3102 User Manual

USB-3102 User's Guide
Input leakage current
Input high voltage
Input low voltage
Output high voltage (Note 9)
Output low voltage (Note 10)
Note 9: SYNCLD is a Schmitt trigger input and is over-current protected with a 200 Ohm series resistor.
Note 10: When SYNCLD is in input mode, the analog outputs may either be updated immediately or when a positive
edge is seen on the SYNCLD pin (this is under software control.) However, the pin must be at a low logic level
for the DAC outputs to be updated immediately. If an external source is pulling the pin high, no update will
occur.

Counter

Parameter
Pin name
Number of channels
Resolution
Counter type
Input type
Counter read/writes rates
(software paced)
Schmidt trigger hysteresis
Input leakage current
Input frequency
High pulse width
Low pulse width
Input high voltage
Input low voltage

Memory

Parameter
EEPROM
EEPROM configuration

Microcontroller

Parameter
Type
Program memory
Data memory
IOH = –2.5 mA
No load
IOL = 2.5 mA
No load
Table 9. CTR I/O specifications
Condition
Counter read
Counter write
Table 10. Memory specifications
Specification
256 bytes
Address range
0x000-0x0FF
Table 11. Microcontroller specifications
Specification
High performance 8-bit RISC microcontroller
16,384 words
2,048 bytes
18
±1.0 µA typ
4.0 V min, 5.5 V absolute max
1.0 V max, –0.5 V absolute min
3.3 V min
3.8 V min
1.1 V max
0.6 V max
Specification
CTR
1
32-bits
Event counter
TTL, rising edge triggered
System dependent, 33 to 1000 reads per second.
System dependent, 33 to 1000 reads per second.
20 mV to 100 mV
±1.0 µA typ
1 MHz max
500 nS min
500 ns min
4.0 V min, 5.5 V absolute max
1.0 V max, –0.5 V absolute min
Access Description
Read/write 256 bytes user data
Specifications