Справочник Пользователя для Digi 90000797_A
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
20
Connect Wi-Wave Hardware Reference, Rev A 2/2008
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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
Voltage monitor
The development board provides a power supply voltage monitor and reset
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.
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.
Alternative
methods to trigger
RESET#
methods to trigger
RESET#
In addition to supply voltage monitoring, reset logic can be triggered in two other
ways. The RESET# signal is asserted when you do one of these actions:
ways. The RESET# signal is asserted when you do one of these actions:
Manually push SW1, a pushbutton reset switch on the development board
Pull low pin 15 on the JTAG breakout header, P20.