Quectel Smart Module Series, Проектирование аппаратного обеспечения

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Smart Module Series
SA800U-WF Hardware Design
SA800U-WF_Hardware_Design 19 / 106
VREG_S4A_1V8
J2-124,
J2-126,
J2-128
PO 1.8 V output
Vnom = 1.8 V
I
O
max = 2000 mA
Power supply for
external GPIO’s
pull-up circuit and
level shift circuit.
LVS1A_1V8 J1-149 PO 1.8 V output
Vnom = 1.8 V
I
O
max = 300 mA
Power supply for
IOVDD of
cameras.
Add a 1.0
–4.7 μF
bypass capacitor if
used.
If unused, keep
this pin open.
LVS2A_1V8 J2-148 PO 1.8 V output
Vnom = 1.8 V
I
O
max = 100 mA
Power supply for
IOVDD or VDD of
sensors.
Add a 1.0
–2.2 μF
bypass capacitor if
used.
If unused, keep
this pin open.
LDO12A_1V8 J3-12 PO 1.8 V output
Vnom = 1.8 V
I
O
max = 300 mA
Connect this pin to
SHDN of
SMB1355 parallel
charger to make
the charger enter
low power mode.
If SMB1355 is
unused, keep this
pin open.
LDO14A_1V88 J4-9 PO 1.8 V output
Vnom = 1.8 V
I
O
max = 50 mA
Power supply for
IOVDD of TP and
LCDs.
Add a 1.0
–4.7 μF
bypass capacitor if
used.
If unused, keep
this pin open.
LDO19A_3V0 J2-150 PO 3.0 V output
Vnom = 3.0 V
I
O
max = 600 mA
Power supply for
sensors
Add a 1.0
–2.2 μF
bypass capacitor if
used.
If unused, keep
this pin open.