To Next Page

To Previous Page

HSPA/UMTS/GSM/GPRS Module Series

UG96&UG95&M95 R2.0 Compatible Design

UG96&UG95&M95 R2.0_Compatible_Design 23 / 42

The power-off scenario is illustrated as the following figure.

VBAT

PWRKEY

(INPUT)

STATUS

(OUTPUT)

EMERG_OFF

(INPUT)

Log out from network in 2s~12s

0.7s<pull-down<1s

Figure 8: M95 R2.0’s Power-off Scenario

Network logout time is related to local network signal strength.

4.3.3. Emergency Shutdown

UG96/UG95 can be shut down by PWRDWN_N pin and M95 R2.0 can be shut down by EMERG_OFF

pin. The two pins should only be used under emergency situations, such as when the module crashes or

works abnormally. Although turning off the module by PWRDWN_N or EMERG_OFF is fully tested and

nothing wrong detected, this operation is still a big risk as it could cause destroying of the code or data

area of the flash memory in the module. Therefore, it is recommended that PWRKEY or AT command

should always be the preferential way to turn off the module.

The following circuit is a reference design for UG96/UG95 and M95 R2.0’s emergency shutdown.

4.7K

47K

pulse

PWRDWN_N (UG96/UG95)

Module

EMERG_OFF (M95 R2.0)

Figure 9: Driving Circuit of Emergency Shutdown

NOTE

Quectel UG96 User Manual

Other manuals for Quectel UG96