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A B O U T T H E D E V E L O P M E N T B O A R D
Switches and reset functionality
S w i t c h e s a n d r e s e t f u n c t i o n a l i t y
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The development board provides a power supply voltage monitor and reset
Voltage monitor
generator. When the +3.3V regulated supply voltage drops below 2.93V, the reset
signal — RESET# — is asserted for a minimum of 140 msec. This signal is connected
to the Digi Connect Wi-Wave edge connector (pin 22), as well as to the debug
breakout header for monitoring.
In addition to supply voltage monitoring, reset logic can be triggered in two other
Alternative
methods to trigger
ways. The RESET# signal is asserted when you do one of these actions:
RESET#
Connect Wi-Wave Hardware Reference, Rev A 2/2008
20
Manually push SW1, a pushbutton reset switch on the development board
Pull low pin 15 on the JTAG breakout header, P20.
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