
Pin
Number
Pin Name
I/O
Reset
Status
Description
Type
40
SIM2_DETECT
DI
- -
USIM2 detection Active high
by default. And high level
indicates a SIM card is
inserted; and low level
indicates a SIM card is
removed.
1.8V
42
UIM2_DATA
DIO
L
USIM1 data
1.8V/3V
44
UIM2_CLK
DO
L
USIM1 clock
1.8V/3V
46
UIM2_RESET
DO
L
USIM1 reset
1.8V/3V
48
UIM2_PWR
PO
- -
USIM1 power supply
1.8V/3V
66
SIM1_DETECT
DI
- -
USIM1 detection Active high
by default. And high level
indicates a SIM card is
inserted; and low level
indicates a SIM card is
removed.
1.8V
5.4.2. (U)SIM Interface Circuit
(U)SIM Card Slot with Card Detection Signal
(U)SIM card slot should be selected for (U)SIM design. It is recommended to use (U)SIM
card slot with hot plug detection function.
The following figure shows the reference design circuit. When (U)SIM card is inserted,
USIM_DET pin is at high level, when (U)SIM card is removed, USIM_DET pin is at low level.
5. Functional Interface
Copyright © Fibocom Wireless Inc.
32
Fibocom Confidential