UMTS/HSPA+ Module Series
UG89 Hardware Design
UG89_Hardware_Design 29 / 73
possible and must be encircled by ground traces.
Table 9: Pin Description of RESET_N
The recommended circuit is similar to the PWRKEY control circuit. An open-drain/collector driver or button
can be used to control the RESET_N.
Reset pulse
RESET_N
4.7K
47K
300ms
Figure 10: Reference Circuit of Resetting the Module by Using Driving Circuit
RESET_N
S2
Close to S2
TVS
Figure 11: Reference Circuit of Resetting the Module by Using Button
Pin Name
Pin No.
I/O
Description
Comment
RESET_N
34
DI
Reset the module.
Active low.
1.8V power domain.
If unused, keep it open.