UM11082
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© NXP B.V. 2018. All rights reserved.
User Manual
Rev. 1.1 — 12 January 2018
7 of 18
NXP Semiconductors
LPC8N04 Development Board
User Manual
3.2.1 Starting the application
The LPC8N04 demo application can be downloaded for free from the Google Play Store.
Search for “NXP LPC8N04 NFC Demo.”
Power up the LPC8N04 Board and press the reset (S3) button (note that the RESET label
on Rev A boards is adjacent to S2, but S3 is the reset switch). Turn the board over so the
LED array is on top and oriented to the left. The center column of LEDs will light in turn in
a repeating pattern. Note that after 100 seconds of inactivity, the demonstration firmware
will go into a low power state, and the center LED will blink approximately once every
second. This is to prevent accidentally draining a battery (if fitted). If this occurs, press the
reset button to re-activate the demo.
Ensure NFC is enabled on the smartphone, then activate the App. Tap on the “LED TEXT
AND MUSIC” tab at the top left, then the Read NDEF button.
3.2.2 Enabling and reading the and scrolling message & temperature
Bring the phone close to the antenna section of the board, to the right of the antenna
section of the Board. As the smartphone detects the Board it will either vibrate and/or play
a tone (depending on its settings). Once this happens, a message will start scrolling
across the LED array, and the message content will appear in the text box. This message
is stored in the EEPROM, along with the current temperature of the LPC8N04 and will
have been read over NFC. The default message is “The LPC Experience; Your World
Reimagined Temp is 78.9F” (although the temperature value will vary). The read
performance will also be read, and the currently set scroll speed will be shown.
Fig 3.
SWD/Speaker/LED selection jumpers
PIO0_11_SWDIO
PIO0_10_SWCLK
LED_COL_4
LED_COL_3
BUZZER_CTL1
LED_ROW_6
PIO0_3
TARGET_SWCLK
TARGET_SWDIO
1
Position
Function
LED
SWD
Position
Function
LED
SWD
Function
LED
Speaker
1
1
2
2
3
3
4
4
P7
1
1
2
2
3
3
4
4
P8
1
1
2
2
3
3
4
4
P9
2
4
3
1
2
4
3
1
2
4
3