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MeiG_SLM156_Hardware Design Manual
MeiG Smart Technology Co., Ltd
20/63
required, if
unused, keep it
open
I2C_SDA
44
O
D
I2C data
External pull-up
to 1.8V is
required, if
unused, keep it
open
RF interface
MAIN _ANT
5
IO
Main antenna
50 ohm
impedance
GNSS_ ANT
10
AI
GNSS antenna
50 ohm
impedance
If unused, keep it
open
Other interfaces
Pin name
Pin number
I/O Descriptin
DC features
Note
GNSS_EN
19
DI
Sleep mode
controls input
VILmin=-0.3V
VILmax=0.6V
VIHmin=1.2V
VIHmax=2.0V
External 1.8V
pull-up is
required,
In high level, the
module is waken
up; in low level,
the module
enters into sleep
mode, if unused,
keep it open
AP_READY
17
DI
application
processor sleep
mode detection
VOLmax=0.45V
VOHmin=1.35V
External pull-up
to 1.8V is
required, if
unused, keep it
open
RESOUT_N
18
D
O
Reset status
indication
signal
VOLmax=0.45V
VOHmin=1.35V
1.8V power
domain, if
unused, keep it
open
GRFC_3
20
IO
Control RF
switch
VIHmax=2.1V
VIHmin=1.3V
VILmax=0.5V
VOLmax=0.45V
VOHmin=1.35V
1.8V power
domain, if
unused, keep it
open
GRFC_2
21
IO
Control RF
switch
VIHmax=2.1V
VIHmin=1.3V
VILmax=0.5V
VOLmax=0.45V
1.8V power
domain, if
unused, keep it
open