Measurement Computing USB-1608FS - Manual (Page 22)

USB-1608FS User's Guide
22
Counter
Table 8. Counter specifications
Parameter Specification
Pin name CTR
Counter type Event counter
Number of channels 1
Input type Schmitt trigger, 47 k
Ω pull-down to ground
Input source CTR screw terminal
Resolution 32 bits
Schmitt trigger hysteresis 1.01 V typ
0.6 V min
1.5 V max
Input high voltage threshold 2.43 V typ
1.9 V min
3.1V max
Input high voltage limit 5.5 V absolute max
Input low voltage threshold 1.42 V typ
1.0 V min
2.0 V max
Input low voltage limit –0.5 V absolute min
0 V recommended min
Maximum input frequency 1 MHz
High pulse width 500 ns min
Low pulse width 500 ns min
Memory
Table 9. Memory specifications
Parameter Specification
Data FIFO 32,768 samples, 65,536 bytes
EEPROM 1,024 bytes
EEPROM configuration Address range Access Description
0x000-0x07F Reserved 128 bytes system data
0x080-0x1FF Read/write 384 bytes cal data
0x200-0x3FF Read/write 512 bytes user area
Microcontroller
Table 10. Microcontroller specifications
Parameter Specification
Type High performance 32-bit RISC microcontroller