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USIM1_VDD
USIM1_DATA
USIM1_CLK
USIM1_RST
USIM1_DET
The following figure shows a reference design for (U)SIM interfaces with a 8-pin (U)SIM card connector.
USIM_VDD
USIM_RST
Module
USIM_CLK
USIM_DET
USIM_DATA
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.
SC200K_Series_Hardware_Design
26
PO
(U)SIM1 card power supply
25
DIO
(U)SIM1 card data
24
DO
(U)SIM1 card clock
23
DO
(U)SIM1 card reset
(U)SIM1 card hot-plug
22
DI
detect
VDD1V85
USIM_VDD
51K
22R
22R
22R
33 pF 33 pF 33 pF
μF
1
20K
GND
GND
Smart Module Series
default.
Either 1.8 V or 2.95 V (U)SIM
card is supported and can be
identified automatically by the
module.
Active low.
If unused, keep it open.
Disabled by software by
default.
(U)SIM Connector
VCC
GND
RST
VPP
IO
CLK
48 / 105
GND
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