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3.2
Module Power-Up
The module is supplied using one of two power sources:
From the on-board regulator that uses the main host supply (P5V) as input
From an external 3.3V source through connector (U319), by following the steps below:
Place a jumper between LDOS_OFF and P5V pins of U319 connector to disable the
on-board regulator
Apply external 3.3V at P3VX_HOST pins of U319 connector, as shown in the
Figure1.
Figure 1: External Power Source
3.3
Operating Conditions
The input voltage supply must follow the table below.
Parameter
Symbol
Condition
Min
Typical
Max
Unit
+5
P5V
Supply from (U6)
-
5
-
V
+3.3
P3VX_HOST
Supply from (U319)
P3VX_HOST
3.0
3.3
3.6
Table 1: Voltage Operating Conditions
3.4
Default Board Configuration
The default operation of the board consists of the following:
Module is supplied from on-board regulator:
LDOS_OFF pulled to GND
POWER_ON/OFF pulled to GND
SCL, SDA, INT_L and MODPRS_L are pulled-up by placing the corresponding jumpers.
The image below shows the default jumpers placement for the low speed signals.
