User Guide

24／35
3.7.1 W_DISABLE# Signal
The W_DISABLE# signal can be used to disable the RF communication
,
which can controlled through hardware and software. Table 10 shows the operating status of
radio frequency.
Table 10 Operating status of radio frequency
W_DISABLE# RF status
High Level Enable RF
High Level Disable RF
Low Level Disable RF
3.7.2 PERST# Signal
PERST# signal can be used externally reset the module. PERST# 150~460ms can be pulled
down to reset the module. PERST# signal is sensitive to interference, so keep the route on the
module interface board as short as possible and shield with ground.
Figure 7 Timing Sequence of Module Reset
V
IL
≤ 0.5V
V IH ≥ 1.3V
VBAT
ms 150
Resetting
Module
Status
Running
PERST#
Restart
460 ms
uCloudlink M3B Mini PCIe-C _Hardware Design Guide_V1.0
AT command
ＡＴ＋ ＣＦＵＮ＝ １
ＡＴ＋ ＣＦＵＮ＝ ０
ＡＴ＋ ＣＦＵＮ＝ ４
ＡＴ＋ ＣＦＵＮ＝ ０
ＡＴ＋ ＣＦＵＮ＝ １
ＡＴ＋ ＣＦＵＮ＝ ４