UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
UC200T-EM_Hardware_Design 28 / 68
RESET_N
S2
Close to S2
TVS
Figure 9: Reference Circuit of RESET_N by Using Button
1. Use RESET_N only when turning off the module by
AT+QPOWD
command and PWRKEY pin failed.
2.
Ensure that there is no large capacitance on PWRKEY and RESET_N pins.
3.
Drive RESET_N to low level can only reset the baseband chip in the module, but PMIC.
3.8.
(U)SIM Interface
The (U)SIM interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and 3.0V
(U)SIM cards are supported.
Table 9: Pin Definition of the (U)SIM Card Interface
Pin Name Pin No.
I/O
Description
Comment
USIM_VDD
14
PO
Power supply for (U)SIM card
Either 1.8V or 3.0V is supported
by the module automatically.
USIM_DATA 15
IO
Data signal of (U)SIM card
USIM_CLK
16
DO
Clock signal of (U)SIM card
USIM_RST
17
DO
Reset signal of (U)SIM card
USIM_
PRESENCE
13
DI
(U)SIM card insertion detection
1.8V power domain.
If unused, keep it open.
USIM_GND
10
Specified ground for (U)SIM card
NOTES