DC-ME-01T-C-50 Digi International, DC-ME-01T-C-50 Datasheet - Page 41

• Manufacturer Part Number: DC-ME-01T-C-50
• Description: ME 8MB SDRAM 2MB FLASH 50 PAK
• Manufacturer: Digi International

Specifications of DC-ME-01T-C-50

• Module/board Type: Device Server
• For Use With/related Products: Networking
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Soft Reset
Net+OS provides an internal facility to enact a soft reset, but it is the responsibility of a
specific implementation to choose a reasonable trigger to invoke it. One choice is to use a
GPIO pin as a signal to trigger a soft reset. The Digi Connect ME has one GPIO pin named
"/INIT” (PORTC5) that is not normally assigned to any other task. It is an ideal candidate
for a soft reset. The signal is exposed via pin 20 on the 20-pin header, so it can be
controlled by an embedded host. When plugged into the development board, the /INIT
signal is pulled high, unless a jumper is placed across pins 2 and 3 of jumper block P12. In
this way, placing the jumper simulates pressing a soft reset button.
The naresetapp example application demonstrates a simple mechanism for monitoring a
GPIO pin and then initiating a soft reset when the pin achieves a particular value.
Delay
Threshold
Minimum Hold Time
Characteristic
Reset Characteristics
250 milliseconds (typical)
2.88 V
1 microsecond pulse
Specification
P r o g r a m m i n g C o n s i d e r a t i o n s
3 3