Fibocom L850-GL - 3.8 Clock Interface; 3.9 ANT Tunable Interface; 3.10 Configuration Interface

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L850-GL Hardware User Manual Page 40 of 54
3.8 Clock Interface
The L850 module supports a clock interface, it can output 26MHz clock.
Pin Pin Name I/O Reset Value Pin Description Type
46 SYSCLK O
26M clock output, default disabled
can be used for external GPS, etc
1.8V
3.9 ANT Tunable Interface
The module supports ANT Tunable interfaces with two different control modes, i.e. MIPI interface and 3bit
GPO interface. Through cooperating with external antenna adapter switch via ANT Tunable, it can flexibly
configure the bands of LTE antenna to improve the antenna’s working efficiency and save space for the
antenna.
Pin Pin Name I/O Pin Description Type
56
RFE_RFFE2_
SCLK
O
Tunable ANT control, MIPI Interface,
RFFE2 clock, Open Drain output
CMOS 3.3/1.8V
58
RFE_RFFE2_
SDATA
O
Tunable ANT control, MIPI Interface,
RFFE2 data, Open Drain output
CMOS 3.3/1.8V
59 ANTCTL0 O
Tunable ANT control, GPO interface,
Bit0
CMOS 1.8V
61 ANTCTL1 O
Tunable ANT control, GPO interface,
bit1
CMOS 1.8V
63 ANTCTL2 O
Tunable ANT control, GPO interface,
Bit2
CMOS 1.8V
3.10 Configuration Interface
The L850 module provides four config pins for the configuration as the WWAN-PCIe, USB3.0 type M.2
module:
Pin Pin Name I/O Reset Value Pin Description Type
1 CONFIG_3 O
-
NC
21 CONFIG_0 O
L
Internally connected to GND