Reset Signal (System_Reset_N); Pin Descriptions; Electrical Characteristics - Sierra Wireless AirPrime SL808 Series Product Technical Specification & Customer Design Manuallines

Product Technical Specification & Customer Design Guidelines
68 Proprietary and Confidential - Specifications subject to change

5.3 Reset Signal (SYSTEM_RESET_N)

This signal is used to force the AirPrime SL808X Embedded Module to reset.
Note that an operating system reset is preferred to a hardware reset.
Table 5-4: Reset signal features
Feature
Purpose Reset modem
Used by host to reset the modem.
•
Implementation Digital input. 1.8 V logic
•
Signal is driven only by an open-drain output from the host.
•
Host must provide a 50-100 k
•
Note: This pin is also required for JTAG programming.
Caution: This signal should only be used for EMERGENCY resets.

5.3.1 Pin descriptions

Table 5-5 describes the SYSTEM_RESET_N signal pin.
See Digital I/O electrical information
and reset state definitions.
Table 5-5: Reset signal pin description
Pin Signal
SYSTEM_RESET_N
63

5.3.2 Electrical characteristics

Table 5-6 describes the reset signal's electrical characteristics.
Refer to Table 4-2 on page 34 for basic characteristics (type, voltage).
Table 5-6: Reset signal electrical characteristics
Parameter
a
Input impedance (R)
Input impedance (C)
SYSTEM_RESET_N
b
time (Rt)
Details
on page 39 for1V8 voltage characteristics
I/O
I
Minimum Typical
100
10n
200

external pull-up resistor to 1.8 V.
I/O type Description
1V8 Embedded module
reset
Maximum

k
F
us
Unit
2400058