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Configuring the MCB1800

The MCB1800 Evaluation Board is configured using 8 sets of jumpers. The MCB1800 Board ships with the following configuration:

Power Measurement Jumpers

Jumper State Description
J1 3V3A
ON1 Supplies regulated 3.3VDC (3V3A from IC4) to VDDA. This jumper can be removed for monitoring just the analog/ADC current draw of the LPC1850 device.
J1 3V3R
ON1 Supplies regulated 3.3VDC (3V3 from IC3) to VDD. This jumper can be removed for monitoring just the CPU current draw of the LPC1850 device.
J1 3V3IO
ON1 Supplies regulated 3.3VDC (3V3 from IC3) to VDDIO on the LPC1850 device. This jumper can be removed for monitoring just the I/O current draw of the LPC1850 device.
J2 GND SWO
none1 Used for connecting external power monitoring equipment such as PowerScale from Hitex. DO NOT JUMPER THESE PINS.

Real-Time Clock (RTC) Power Jumper

Jumper State Description
J3 3V3A/BAT
3V31 The board power supply powers the RTC. The lithium battery is disconnected and the RTC stops when board power is removed.
BAT The lithium battery powers the RTC. The RTC continues to run even when board power is removed.

Boot Configuration Jumpers

J4A/
P2_9
J4B/
P2_8
J4C/
P1_2
J4D/
P1_1
Boot Mode Description
L L L L USART0 Boot from USART0 using P2_0/P2_1. J13 and J16 must be in position 1-2.
L L L H SPIFI Boot from Quad SPI flash (IC11) connected to P3_3-P3_8.
L H L L EMC 32-bit1 Boot from external NOR flash (32bit) connected to CS0.
L H L H USB0 Boot from USB0.
L H H L USB1 Boot from USB1.
H L L L USART3 Boot from USART3 using P2_3/P2_4. J13 and J16 must be in position 2-3.

Notes:

  • Other boot modes such as EMC 8-bit, EMC 16-bit, SPI flash are not supported on the MCB1800. Please see the NXP LPC1850 User Manual, Chapter 4, LPC18xx Boot ROM for more details.
  • MCUs with on-chip flash (like LPC1857/LPC4357) will always boot from on-chip Flash when it contains a valid application. If you want to boot from the source that is selected with the jumpers above, you can do this:
    1. Erase the on-chip Flash. Use a uVision project where the right on-chip Flash programming algorithm is selected and then select Erase from the uVision Flash menu.
    2. Press the buttons ISP and RESET at the same time. Then first release RESET and then ISP. This forces the MCU to boot from the source selected by the jumpers above.

UART Jumpers

Jumper State Description
J13 RX UART0 Connects P2_1 to the RS232 receive line driver and DB9 connector.
UART31 Connects P2_4 to the RS232 receive line driver and DB9 connector.
J16 TX UART0 Connects P2_0 to the RS232 transmit line driver and DB9 connector.
UART31 Connects P2_3 to the RS232 transmit line driver and DB9 connector.
URST OFF1 Disables Reset via COM0.
UISP OFF1 Disables In-System Programming via COM0.

Note:

  • The MCU will boot from UART0 or UART3 as long as the Boot Mode jumper setting(J4) matches the UART selected. The UART0 pins (P2_0 and P2_1) are also used by the external address bus.

    DO NOT move the J13/J16 jumpers to the UART0 position when the external address bus is in use.

CAN Jumpers

Jumper State Description
J19 & J20 CAN ON1 Install both jumpers to provide 120 ohm termination to the CAN bus. Remove both jumpers if the bus is already terminated. The CAN bus requires 120 ohm termination at both ends of the bus.

Audio Jumpers

Jumper State Description
J10 L+R OFF1 This jumper merges left and right channel microphone inputs, producing a monophonic signal. Install this jumper when a stereo microphone is connected to the MIC in jack(P7).
J14 Codec/DAC DAC1 Connects the on-board loudspeaker amplifier to the digital analog (DAC) output of the MCU.
Codec Connects the on-board loudspeaker amplifier to the left channel line-out output of the codec. The microcontroller configures the codec via I2C interface and sends the audio data via I2S interface.

Debug Jumper

Jumper State Description
J5 DBG_EN ON1 Enables the Cortex Debug (J6), Cortex Debug + ETM (J7) and JTAG (J8) debug interfaces.

LED Jumper

Jumper State Description
J21/LED_EN
ON1 Enables the 8, port-driven LEDs.

1 Factory setting of MCB1800 and MCB4300 board jumpers.

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