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Z51F3220 Datasheet, PDF (23/54 Pages) Zilog, Inc. – 1 green LED to indicate USB power: D5
Z51F3220 Development Kit
User Manual
16
Figure 12. A Successful USB-to-UART Driver Installation
Note: To launch the Device Manager on Windows 7 systems, launch the Start menu, enter device
manager in the Search programs and files field, and press the Enter key.
To open the Device manager on earlier Windows systems, navigate via the following path:

Start → Control Panel → System → Hardware → Device Manager → Ports (COM& LPT)
UM024307-1112
Install the Z8051 OCD Software and Documentation