Datasheet

NXP Semiconductors
AN12395
OM-SE050ARD hardware overview
AN12395 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved.
Application note Rev. 1.1 — 27 June 2019
534311 9 / 24
4.3 Deep power-down mode
The deep power-down mode reduces the SE050 power consumption to the minimum. In
this mode, only I
2
C pads stay supplied via V
in
. The deep power-down mode is enabled by
setting the ENA pin to a logic zero. In addition, it is required to supply V
in
pin and connect
V
out
and V
cc
pins at the PCB level.
The ENA pin controls an internal switch between V
out
and V
in
as shown in Figure 6.
Therefore, if V
out
is connected to V
cc
, the ENA pin can effectively switch the power on
and off to V
cc
.
Figure 6. Deep power-down mode diagram
The jumpers J13 and J14 of the OM-SE050ARD allow you to control the SE050 deep
power-down mode. To enable the deep power-down mode using the OM-SE050ARD:
• J13: Must be set to position 2-3.
• J14: Must be set to position 3-4.
Table 4 describes the OM-SE050ARD jumper settings for the deep power-down mode
configuration
Table 4. Jumpers for deep power-down mode configuration
Jumper Description 1-2 2-3 3-4 5-6
J13 SE050_ENA
pin routing
ENA low.
Switch disabled
ENA controlled
by Arduino R3
(Default)
n.a. n.a.
J14 SE050_V
CC
pin
routing
Routed to V
DD
supply voltage
n.a. Routed to
SE050_V
out
pin
(Default)
Routed to
J11:4 pin
Figure 7 highlights in blue the location of jumper J13 and J14.