User Manual: BlueBoard-LPC214X
Revision 1.3
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3.2.7 Buzzer
Test setup:
Connect jumper to J23, when the board is turned on or RESET you will hear a beep after few seconds.
This is how the user can confirm the status of the Buzzer.
3.2.8 SD/MMC connector
Test setup:
Insert a SD card in the SD card holder (J24), the status of the SD card will be displayed on LCD upon
power cycle or reset of the BlueBoard. If the SD card is inserted properly “SD card – OK” is displayed on LCD else it
displays “SD card- Not OK”. During manufacturing the board is tested with Kingston’s 1GB SD card.
Note: The SD/MMC card being tested should be formatted with FAT file system (Not FAT32 or NTFS format).
3.2.9 Audio jack
Test setup:
Connect a headset to the audio jack connector. You should hear a ding sound being played. The sound
is heard only for few seconds after power ON or RESET.
3.2.10 PS/2 keyboard
Test setup:
To enable PS/2 connect jumper to J15. Connect a PS/2 keyboard to this connector. Now press any key
on the keyboard. The user can see which key he/she has pressed on the LCD.
3.2.11 LCD display
Test setup:
To enable the LCD connect jumpers to all pins of J18. A default message “NGX TECHNOLOGIES” will
be displayed and later status of SD/MMC and I2C is displayed. The back light of LCD can be controlled by connecting
jumper to appropriate pins of J19. The contrast of LCD can be varied using the POT.
3.2.12 RTC :
A 2- pin connector J27 is provided for RTC.Connect an external battery to use the to this connector to
work with RTC.
3.2.13 ADC :
The ADC port is given to a POT. To test the ADC rotate the POT, as the POT position varies the output
number of LEDs that are turned ON varies.