UG-AL5721_1.0 P.4/7
36 USB D- I/O USB D- data signal from host system
37 C2D I/O Test signal for 8051CF326 USB controller
38 USB D+ I/O USB D+ data signal from host system
39 C2CLK I/O Test signal for 8051CF326 USB controller
40 GND Ground connection
41 AL_GPIO_2 I/O MAC GPIO signal, functionality may be determined
by customer definition
42 Dock_LED O LED drive pin, functionality per table 2
43 AL_GPIO_4 I/O MAC GPIO signal, functionality may be determined
by customer definition
44 Security_LED# O LED drive pin, functionality per table 2
45 AL_GPIO_5 I/O MAC GPIO signal, functionality may be determined
by customer definition
46 Data_LED# O LED drive pin, functionality per table 2
47 AL_GPIO_7 I/O MAC GPIO signal, functionality may be determined
by customer definition
48 NC No Connection
49 Host_Connect_LED O LED drive pin, functionality per table 2
50 GND Ground connection
51 NC No Connection
52 3.3V +3.3V Regulated power from host system
Table 1. Pin Descriptions
4.0 DESIGN CONSIDERATIONS
4.1 Power
One +3.3 V power supply at max data rate average current of 500 mA with peak at 750
mA. Connector pins #2 and 52 (+3.3V) are connected in common, both should connect
to the host system power rail. Connector pins #4, 9, 15, 18, 21, 26, 27, 29, 34, 35, 40,
and 50 are connected in common, all should connect to the host system ground.
4.2 LED Indicator Functions
Name Functional Description
Dock LED Steady flashing when dock power is applied and radio is beaconing but not connected to a host.
LED is solid when a wireless connection is made to a Host PC.
Security LED
Normally off, Flashes during cable association process, Goes solid when a successful cable
association is made.
During wireless operation, this LED is off when there is not wireless connection to a host,
when successful Secure wireless connection is made to a pre-associated host, the LED goes solid.
Data LED Flashes when data is being passed wireless in either direction.
Host Connect LED Normally off. The LED goes solid when a wireless connection is made with the host.
This "Host Connect" LED indicates that the dock is successfully connected to the host.
Table 2. LED Indicator Functionality
