Analog Devices Blackfin EZ-Extender 82-000845-01, Manual

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Switch Settings
2-8 Blackfin USB-LAN EZ-Extender Manual
processor cannot be established. The
SW1.3
adds flexibility to the
extender—when the switch is
OFF
, the Flag can be used for other peripher-
als of the EZ-KIT Lite.
Test Mode Enable Switch (SW1.4)
The test mode enable switch,
SW1.4
, is an internal test pin and should not
be used. This switch, by default, is set to the
OFF
position.
Serial ROM Enable Switch (SW2.1)
The serial ROM enable switch,
SW2.1
, is used to control the connection
between the LAN91C111 Ethernet processor with its serial ROM (
U3
).
When the switch is disabled, the Ethernet processor loads its Media Access
Control (MAC) address from the serial ROM. The
SW2.1
switch, by
default, is set to the
OFF
position. If the switch is in the
ON
position, you
are not able to communicate with the Ethernet application code provided.
The switch adds flexibility to the extender—you can modify the applica-
tion code and generate another MAC address when the switch is
ON
.
Table 2-6. SW1.3 Settings
Functionality SW1.3 Setting
USB IRQ enabled ON (default)
USB IRQ disabled OFF
Table 2-7. SW1.4 Settings
Functionality SW1.4 Setting
Test mode enabled ON
Test mode disabled OFF (default)
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