Fibocom FM101-GL - USIM Interface; USIM Pins; USIM Interface Circuit; SIM Card Slot

3 Application Interface
Copyright © Fibocom Wireless Inc. 34
3.4 USIM Interface
The FM101 module has Dual SIM (one embedded eSIM and USIM interface). USIM interface
supports 1.8V/3V SIM card.
3.4.1 USIM Pins
The USIM pins description is shown in the following table:
Pin
Pin Name
I/O
Reset Value
Description
Type
36
UIM1_PWR
PO
-
USIM power supply
1.8V/3V
30
UIM1_RESET
O
-
USIM reset
1.8V/3V
32
UIM1_CLK
O
-
USIM clock
1.8V/3V
34
UIM1_DATA
I/O
-
USIM data, internal pull up(4.7KΩ)
1.8V/3V
66
SIM1_DETECT
I
PD
USIM card detect, internal 390 KΩ
pull-up. Active high, and high level
indicates SIM card is inserted; and
low level indicates SIM card is
detached.
1.8V
3.4.2 USIM Interface Circuit
3.4.2.1 N.C. SIM Card Slot
The reference circuit design for N.C. (Normally Closed) SIM card slot is shown in Figure 12: