Smart Module Series
SC606T Series Hardware Design
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3.10. (U)SIM Interfaces
The module provides two (U)SIM interfaces which meet ETSI and IMT-2000 requirements. Dual SIM Dual
Standby is supported by default. Both 1.8 V and 2.95 V (U)SIM cards are supported, and the (U)SIM
interfaces are powered via dedicated LDOs in the module.
Table 12: Pin Definition of (U)SIM Interfaces
The module supports (U)SIM card hot-plug via the USIM_DET pin, which is disabled by default and can
be enabled through software configuration. A reference design for the (U)SIM interfaces connected with
Pin Name
Pin No. I/O
Description
Comment
USIM1_DET
145
DI
(U)SIM1 card hot-plug
detect
Active low.
Require to be externally pulled up
to 1.8 V.
If unused, keep this pin open.
Disabled by default, and can be
enabled through software
configuration.
USIM1_RST
144
DO
(U)SIM1 card reset
USIM1_CLK
143
DO
(U)SIM1 card clock
USIM1_DATA
142
DIO
(U)SIM1 card data
Require to be pulled up to
USIM1_VDD with a 10 k
Ω
resistor.
USIM1_VDD
141
PO
(U)SIM1 card power supply
Either 1.8 V or 2.95 V (U)SIM card
is supported.
USIM2_DET
256
DI
(U)SIM2 card hot-plug
detect
Active low.
Require to be externally pulled up
to 1.8 V.
If unused, keep this pin open.
Disabled by default and can be
enabled through software
configuration.
USIM2_RST
207
DO
(U)SIM2 card reset
USIM2_CLK
208
DO
(U)SIM2 card clock
USIM2_DATA
209
DIO
(U)SIM2 card data
Require to be pulled up to
USIM2_VDD with a 10 k
Ω
resistor.
USIM2_VDD
210
PO
(U)SIM2 card power supply
Either 1.8 V or 2.95 V (U)SIM card
is supported.