Digi Digi Conntect ME, Hardware Reference Manual

Page: 44 / 64

E n v i r o n m e n t a l
4 4
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D i g i C o n n e c t W i - M E & D i g i C o n n e c t M E H a r d w a r e R e f e r e n c e
Note
The embedded modules provide an on board supervisor circuit with a 2.88V
reset threshold and an internal 5k pull-up resistor. When VCC falls to the
threshold voltage, a reset pulse is issued, holding the output in active state.
When power rises above 2.88V, the reset remains for approximately 250 ms to
allow the system clock and other circuits to stabilize.
Environmental
Outputs
Symbol Description Min Typ Max Unit
V
OH
Output High
Voltage
2.4 — 3.45 V
V
OL
Output Low
Voltage
0 — 0.4 V
Digi Connect ME Digi Connect Wi-ME
Ambient
Temperature
-40
o
F to 185
o
F
(-40
o
C to 85
o
C)
-4
o
F to 185
o
F
(-20
o
C to 85
o
C)
Storage
Temperature
-40
0
F to 257
0
F
(-40
0
C to 125
0
C)
Humidty 5% to 90%
Altitude
12000 feet
(3657.60 meters)
DC_ME-HWR.book Page 44 Thursday, July 1, 2004 11:12 AM