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FIBOCOM_NL952-NA_Hardware_User_Manual
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The recommended timing application in Chrome/Android/Linux OS is as below table:
System status
Timing Application
Power on
Refer to
Figure 3-5 Timing control for start-up
Shut down
Refer to
Figure 3-6 Software power off timing
Connect standby
Refer to
Restart
Refer to
nd
Modem FW upgrade / Modem recovery Refer to
st
3.4 IPC Interface
NL952 module supports PCIe and USB as IPC interface for data transfer. PCIe and USB interface functions
are as below table:
Interface System
Priority Description
PCIe
Win10 OS
High
Priority: PCIe>USB.
If PCIe and USB ports both connected with PC, module will
initial PCIe first, then disable USB port
USB
Chrome/Linux/
Android OS
Low
It must disconnect PCIe port, only keep USB connecting.
If keep PCIe and USB connecting both, it needs disable PCIe
by BIOS/UEFI of PC
PCIe Interface
NL952 module supports PCIe Gen2, one lane for data transmission channel, it is also compatible with
PCIe Gen1. PCIe interface initialized with host driver, then mapped MBIM & GNSS port in Win10 OS and
RMNET & AT port in Chrome/Linux/Android OS. The MBIM and RMNET interfaces are used for data
transfer, GNSS port is used for receiving GNSS data, AT port is used for AT command.
3.4.1.1 PCIe Interface Definition
Pin#
Pin Name
I/O Reset Value Description
Level
41
PETn0
O
-
PCIe TX Differential signals, Negative
-
43
PETP0
O
-
PCIe TX Differential signals, Positive
-
47
PERn0
I
-
PCIe RX Differential signals, Negative
-
49
PERP0
I
-
PCIe RX Differential signals, Positive
-
