Measurement Computing USB-CTR04 - Manual (Page 5)

Chapter 1
Introducing the USB-CTR04
The USB-CTR04 is a USB 2.0 high-speed data acquisition device that provides the following features:

Four counter I/O
o
High-speed pulse counter for general counting applications; multiple counting modes supported
o
48 MHz, programmable resolution up to 64-bits
o
An aggregate scan rate of 8 MB/s
 Four PWM timers with count, period, delay, and pulse-width registers
 Eight individually-configurable digital I/O channels
 External clock input and internal clock output
 External digital trigger; software-selectable for edge or level sensitive, rising or falling edge, high or low
level
The USB-CTR04 is a USB 2.0 high speed device that is compatible with USB 3.0 ports. The device is also
compatible with USB 1.1 ports, but use with this older hardware is not recommended due to longer initialization
times that can occur when the USB-CTR04 is connected through USB 1.1 ports or hubs.
I/O connections are made to two banks of screw terminals. The USB-CTR04 is powered by the 5 volt USB
supply from your computer.
Functional block diagram
Device functions are illustrated in the block diagram shown here.
Figure 1. USB-CTR04 functional block diagram
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