Digi 90000797_A manual 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

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

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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.

Alternative 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:

„Manually push SW1, a pushbutton reset switch on the development board

„Pull low pin 15 on the JTAG breakout header, P20.

20 Connect Wi-Wave Hardware Reference, Rev A 2/2008