Entry module EVK hardware user guide
Page 19 of 30
2020-09-25
© 2020 by Acconeer
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Switches and buttons
There is one switch on XE132. S1 determines if XM132 is powered from the 3.3V LDO (U4) on
XE132 or from an external power supply via pin header J3 (V_EXT).
There are two buttons on the XE132. J4, DFU (Device Firmware Upgrade), controls the signal
“BOOT0” on the XM132.
Button J5 controls the
“NR
ESE
T”
signal on XM132. In Table 6 the state of
the buttons and the corresponding signal states are listed.
Table 6. The states of the buttons J4 and J5.
Button
Open (default)
Closed
J4
BOOT=0
BOOT0=1
J5
NRESET=1
NRESET=0
3.2. XM132 Entry Module
3.2.1. Overview
The XM132 Entry Module is included in the XE132 design and soldered on the top side of the XE132
via a Land Grid Array pattern on the bottom side of the XM132 PCB. In the schematic below, this
Land Grid Array pattern is called “B2B LGA Connector”.
In Picture 3 below the top and bottom side
of XM132 is shown.
Picture 3 The XM132 top side (left) and bottom side (right)