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FIBOCOM_NL952-NA_Hardware_User_Manual
Page 33 of 57
Two pairs of differential signal lines should be parallel and have the equal length, the right angle
routing should be avoided.
The two pairs differential signal lines should be routed on the layer that is adjacent to the ground layer,
and wrapped with GND vertically and horizontally.
3.5 USIM Interface
The NL952 module support dual SIM card single standby, has dual built-in USIM card interface, which
supports 1.8V and 3V SIM cards.
USIM1 Pins
The USIM1 pins description as shown in the following table:
Pin
Pin Name
I/O
Reset Value Description
Level
36
UIM_PWR
PO -
USIM power supply
1.8V/3V
30
UIM_RESET
O
PD
USIM reset
1.8V/3V
32
UIM_CLK
O
PD
USIM clock
1.8V/3V
34
UIM_DATA
I/O
PD
USIM data, internal pull up(4.7K
Ω
)
1.8V/3V
66
SIM_DETECT
I
PD
USIM card detect, internal 390K pull-
up.
Active high, and high level indicates
SIM card is inserted; and low level
indicates SIM card is detached.
1.8V
USIM2 Pins
The USIM2 pins description as shown in the following table:
Pin
Pin Name
I/O
Reset Value Description
Level
48
UIM2_PWR
PO -
USIM2 power supply
1.8V/3V
46
UIM2_RESET
O
PD
USIM2 reset
1.8V/3V
44
UIM2_CLK
O
PD
USIM2 clock
1.8V/3V
42
UIM2_DATA
I/O
PD
USIM2 data, internal pull up(4.7K
Ω
) 1.8V/3V
40
SIM2_DETECT
I
PD
USIM2 card detect, internal 390K
pull-up.
Active high, and high level indicates
SIM card is inserted; and low level
indicates SIM card is detached.
1.8V