Key Digital ES381 - Manual (Page 7)

2.2 USBcount50 Architecture
The figure below shows a simplified diagram of the USBcount50.
CONTROLLER
&
COUNTER
STACK
CONN
BNC
PSU
DATA
USB
CONTROLLER
USB
ISOLATION BARRIER
8-BIT DAC
`
Vsupply
INPUT PROTECTION
Figure 2.2-1 USBcount50 Architecture Diagram
Elan Digital Systems Ltd. 7 USBcount50 USER’S GUIDE Iss1