Sierra Wireless WISMO218 Benutzerhandbuch
WA_DEV_W218_PTS_002
Rev 005
Page 78 of 109
Product Technical Specification &
Customer Design Guidelines
Reset
The WISMO218 has an input ~RESET pin. This is a hardware reset and should only be used for
emergency reset.
emergency reset.
Feature
The ~RESET signal has a 100K internal pull up resistor to VCC_2V8.
Figure 38. Reset Timing
Table 36. Electrical Characteristics of the Signals
Parameter
Minimum
Typ
Maximum
Unit
~RESET
Input Impedance ( R )*
-
100K
-
Input Impedance (C)
-
10nF
F
Cancellation time (Ta)
at power up only
at power up only
-
38
-
ms
V
H
**
1.57
-
-
V
V
IL
-
0
1.2
V
V
IH
1.96
2.8
--
V
*
Internal pull up resistance
**
V
H :
Hysterisis Voltage
Sequence after an external reset event (~RESET)
To activate the « emergency » reset sequence, the ~RESET signal has to be set to LOW level manually,
for example, by a push button.
for example, by a push button.
Pin Description
Table 37. Reset Pin Descriptions
Signal
Pin Number
I/O
I/O Type
Description
~RESET
12
100K Pull-up
2V8
WISMO218 Reset