Hardware Design
Table Of Contents
- Contents
- Table Index
- Revision History
- 1 Introduction
- 2 Package Information
- 3 Interface Application
- 4 Antenna Interfaces
- 5 Electrical Specifications
- 6 Top and Bottom View of Module
- 7 Label description Information
- 8 Packaging
- Appendix
Smart Machine Smart Decision
SIM8200EA-M2 card Hardware Design _V1.01 24 2019-06-27
T
off(USB)
(Input)
USB Port
Power off
Active
FUL_CARD_POWER_OFF#
T
on-off
Active
Figure 9: Power off timing sequence
Table 9: Power off timing and electronic characteristic
Symbol Parameter
Time value
Unit
Min. Typ. Max.
T
off(usb)
The time from power-off issue to USB port off - TBD - s
T
on-off
The buffer time from power-off issue to power-on issue TBD - - s
3.4 Reset Function
Module can be reset by pulling the RESET# pin down to ground.
Note: This function is only used as an emergency reset, when both AT command “AT+CPOF”
and the FUL_CARD_POWER_OFF# pin have lost efficacy.
The RESET# pin has been pulled up with a resistor to 1.8V internally, so it does not need to be
pulled up externally. It is strongly recommended to put an ESD protection diode close to the
Hardware circuit RESET# pin. Please refer to the following figure for the recommended reference
circuit.
4.7
K
47K
Reset Impulse
RESET#
Reset
Logic
R
1.8V
MODULE
1K
Ω
T
reset
Figure 10: Reference reset circuit
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