Reproduction forbidden without Fibocom Wireless Inc. written authorization - All Rights Reserved.
FIBOCOM_NL952-NA_Hardware_User_Manual
Page 22 of 57
shown in the following table:
Pin
Pin Name
I/O
Reset Value
Functions
Level
6
FULL_CARD_POWER
_OFF#
I
PU
Module power on/off input,
internal pull up(40K
Ω
)
Power on: High/Floating
Power off: Low
3.3/1.8V
67
RESET#
I
PU
WWAN reset input, active low,
internal pull up(40K
Ω
)
1.8V
50
PERST#
I
PU
Asserted to reset module PCIe
interface default. If module went into
core dump, it will reset whole
module, not only PCIe interface.
Active low, internal pull up(10K
Ω
)
3.3/1.8V
Note
：
RESET# and PERST# need to be controlled by independent GPIO, and not shared with other
devices on the host.
Module Start-Up
3.3.1.1 Start-up Circuit
The FCPO#( FULL_CARD_POWER_OFF #) pin needs an external 3.3V or 1.8V pull up for booting up.
AP (Application Processor) controls the module start-up. We recommend to use a reset value low or pull
down port to control FCPO#, and also reserve an external pull down resistor on FCPO#. The circuit
design is shown in Figure3-4:
Figure 3-4 Circuit for Module Start-up Controlled by AP
3.3.1.2 Start-up Timing Sequence
When power supply is ready, the PMU of module will power on and start initialization process by pulling
high FCPO# signal. After about 20s, module will complete initialization process. The start-up timing is
