Counter; Non-Volatile Memory; Microcontroller; Power - Measurement Computing USB-1208FS User Manual

USB-1208FS User's Guide

Counter

Pin name (Note 8)
Counter type
Number of channels
Input type
Input source
Resolution
Schmidt trigger hysteresis
Input leakage current
Maximum input frequency
High pulse width
Low pulse width
Input high voltage
Input low voltage
CTR is a Schmitt trigger input protected with a 1.5K Ω series resistor.
Note 8:

Non-volatile memory

EEPROM
EEPROM Configuration

Microcontroller

Type
Program Memory
Data Memory

Power

Parameter
Supply current (Note 9)
+5V USB power available (Note 10)
Output current (Note 11)
This is the total current requirement for the USB-1208FS which includes up to 10 mA for the
Note 9:
status LED.
Table 14. Counter specifications
CTR
Event counter
1
TTL, rising edge triggered
CTR screw terminal
32 bits
20 mV to 100 mV
±1 µA
1 MHz
500 ns min
500 ns min
4.0 V min, 5.5 V absolute max
1.0 V max, –0.5 V absolute min
Table 15. Non-volatile memory specifications
1,024 bytes
Address Range
0x000-0x07F
0x080-0x1FF
0x200-0x3FF
Table 16. Microcontroller specifications
High performance 8-bit RISC microcontroller
16,384 words
2,048 bytes
Table 17. Power specifications
Conditions
Connected to self-powered hub
Connected to externally-powered root port hub
Connected to bus-powered hub
Connected to self-powered hub
Connected to externally-powered root port hub
Connected to bus-powered hub
29
Access Description
Reserved 128 bytes system data
Read/write 384 bytes cal data
Read/write 512 bytes user area
Specification
80 mA
4.5 V min, 5.25 V max
4.1 V min, 5.25 V max
420 mA max
20 mA max
Specifications