NXP Semiconductors JN516x-EK001, Руководство пользователя, Страница: 20 / 86

Chapter 1
Introduction to the Evaluation Kit
20 © NXP Laboratories UK 2015 JN-UG-3093 v1.5
Normal-Power Mode
In normal-power mode, the board can be powered from one of the following:

4 AAA batteries, connected on the underside of the board

External 7-12V DC supply via 2.1-mm connector

External device via USB Mini B connector
The voltage regulator must be selected for the external DC and USB power supplies
by putting the jumper
J4 into the REG position, as illustrated in Figure 10 - the
regulator is not needed for battery power.
For all sources in normal-power mode, the Low PWR jumper must be put in the REG
position (see Low-Power Mode below).
Low-Power Mode
In low-power mode, the board is powered from 2 AAA batteries connected in the lower
two battery holders (nearest to the 40-way header) on the underside of the board. In
this mode, only the JN516x module is powered (this mode can be used to make low-
current measurements). To select low-power mode, the
Low PWR jumper must be put
in the BAT position, as illustrated in Figure 11 . The jumper J4 (used in normal-power
mode) has no effect in low-power mode and can be left in any position.
Figure 10: Regulator Selection (using J4 Jumper)
Caution: When using an external DC Power Supply
Unit (PSU) with a Carrier Board, only a 7-12V PSU with
a 2.1-mm connector must be used. The 12V PSU
provided in the evaluation kit can be used for a Carrier
Board.
Note: The four Carrier Boards and Linksys router (if
supplied) can be powered from the same 12V DC PSU
by using the supplied 5-way daisy-chain power cable to
link them together. The Raspberry Pi board (if supplied)
must be powered from the dedicated 5V DC PSU.
J4
DC or USB (regulator used)
Batteries (regulator not used)
RE
G
BA
T
J4
RE
G
BA
T