Smart Module Series
SC200K_Series_Hardware_Design 48 / 105
The following figure shows a reference design for (U)SIM interfaces with a 8-pin (U)SIM card connector.
Module
USIM_VDD
USIM_RST
USIM_CLK
USIM_DATA
USIM_DET
22R
22R
22R
VDD1V85
51K
(U)SIM Connector
GND
GND
33 pF
33 pF 33 pF
VCC
RST
CLK
IO
VPP
GND
GND
USIM_VDD
20K
1
μF
Figure 18: Reference Circuit of (U)SIM Interfaces with 8-Pin (U)SIM Card Connector
If (U)SIM card detect function is not needed, you can keep USIM_DET unconnected. A reference circuit
for (U)SIM card interfaces with a 6-pin (U)SIM card connector is illustrated in the following figure.
default.
USIM1_VDD
26
PO
(U)SIM1 card power supply
Either 1.8 V or 2.95 V (U)SIM
card is supported and can be
identified automatically by the
module.
USIM1_DATA
25
DIO
(U)SIM1 card data
USIM1_CLK
24
DO
(U)SIM1 card clock
USIM1_RST
23
DO
(U)SIM1 card reset
USIM1_DET
22
DI
(U)SIM1 card hot-plug
detect
Active low.
If unused, keep it open.
Disabled by software by
default.