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Open4337-C Package B, LPC Development Board


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LPC development board designed for the LPC4337JBD144 MCU, and integrates various standard interfaces, pretty easy for peripheral expansions.

LPC4337JBD144 development board


Open4337-C is an LPC development board designed for the LPC4337JBD144 microcontroller, consists of the mother board and the MCU core board Core4337.

The Open4337-C supports further expansion with various optional accessory boards for specific application. The modular and open design makes it the ideal for starting application development with NXP LPC series microcontrollers.

What's on the mother board

LPC4337JBD144 development board on board resource

  1. MCU core board connector: for easily connecting the MCU core board

  2. ZigBee connector: for connecting ZigBee module

  3. ONE-WIRE interface: easily connects to ONE-WIRE devices (TO-92 package), such as temperature sensor (DS18B20), electronic registration number (DS2401), etc.

  4. I2C0 | I2C1 interface: easily connects to I2C peripherals such as I/O expander (PCF8574), EEPROM (AT24Cxx), etc.

  5. I2S0 interface: for connecting I2S modules such as Audio module, etc.

  6. PS/2 interface: easily connects to PS/2 keyboard and/or mouse

  7. UART1 interface: easily connects to RS232, USB TO 232, etc.

  8. UART2 interface: easily connects to RS232, USB TO 232, etc.

  9. 8 Bit EMC interface: for connecting NandFlash module, etc.

  10. SSP1 interface: easily connects to SPI peripherals such as DataFlash (AT45DBxx), SD card, MP3 module, etc.

  11. SDIO interface: for connecting Micro SD module, features much faster access speed rather than SPI

  12. ADC+DAC interface: for ADC/DAC testing

  13. CAN1 interface: for connecting CAN module

  14. CAN0 interface: for connecting CAN module

  15. LCD interface: for connecting touch screen LCD

  16. ETH interface: for connecting ETH module

  17. USB interface: converts to UART through an onboard USB to UART convertor PL2303

  18. 5V DC jack

  19. 5V/3.3 V power input/output: usually used as power output, also common-grounding with other user board

  20. MCU pins connector: all the I/O ports are accessible on expansion connectors for further expansion

  21. ZigBee programming/debugging interface: for debugging ZigBee module

  22. PL2303, onboard USB to UART convertor

  23. Power indicator

  24. PL2303 TX-LED / RX-LED, UART transmitting/receiving indicator

  25. LEDs: convenient for indicating I/O status and/or program running state

  26. User key: convenient for I/O input and/or interact with running code

  27. Joystick: five positions

  28. Power supply switch, 5V DC or USB

  29. ZigBee reset button

  30. PL2303 jumper: supports programming and/or UART debugging

  31. SD card detect jumper: enable SD card detection function

  32. PS/2 jumper

  33. LEDs jumper

  34. User key jumper

  35. Joystick jumper

For jumpers above:

  • short the jumper to connect to I/Os used in example code

  • open the jumper to connect to other custom pins via jumper wires

What's on the Core4337

Core4337 on board resource

  1. LPC4337JBD144:the LPC ARM Cortex-M4/M0 dual-core microcontroller:

    • Core: Cortex-M4 processor, 204MHz Max

    • Core: Cortex-M0 coprocessor, 204MHz Max

    • Package: LQFP144

    • I/Os: 83

    • Memories: FLASH total 1M, SRAM total 136kB, ROM 64kB, E2PROM 16kB, OTP memory 64 bit

    • Interfaces:

      • 1 x SPIFI, 1 x 10/100T MAC

      • 1 x High-speed USB2.0 Host/Device/OTG

      • 1 x High-speed USB 2.0 Host/Device

      • 1 x 550 UART, 3 x 550 USART, 1 x IrDA

      • 2 x CAN 2.0, 2 x SSP, 1 x SPI, 1 x Fast-mode Plus I2C

      • 1 x standard I2C-bus, 2 x I2S, 1 x EMC, 1 x SD/MMC

      • 1 x PWM, 1 x QEI, 1 x 10-bit DAC, 2 x 10-bit ADC

  2. AMS1117-3.3 (on bottom side), 3.3V voltage regulator

  3. LM3625-H (on bottom side), USB power management device

  4. QSPI FLASH solder pads (on bottom side), for soldering external Flash if required

  5. Power indicator



  8. Reset button

  9. 12M crystal oscillator

  10. 32.768K crystal, for internal RTC with calibration

  11. JTAG/SWD interface: for debugging/programming

  12. USB1 interface:

    • Device mode: communicating with computer

    • Host mode: communicating with USB devices (such as USB Flash Drive) through an adapter cable

  13. USB0 interface, features USB OTG function

  14. MCU pins expander, VCC, GND and all the I/O ports are accessible on expansion connectors for further expansion

  15. 5Vin power input, power the core board from external supply (while working on USB HOST/OTG mode, a 5V power input is required)

  16. BOOT configuration

  17. VBAT selection jumper

    • short the jumper to use system power supply

    • open the jumper to connect the VBAT to external power supply, such as battery

  18. USB PWR OUT jumper

    • short the jumper: powered from USB1 VBUS (it's possible to provide power to the mother board via the 5V pin)

    • open the jumper: powered from the mother board

  19. USB1 jumper

    • short the jumper when using USB1

    • open the jumper to disconnect from I/O port

  20. USB0 jumper

    • short the jumper when using USB1

    • open the jumper to disconnect from I/O port


LPC Development Board
Open4337-C development board

LPC Development Board
Open4337-C development board

LPC Development Board
Open4337-C development board back view

LPC Development Board
Open4337-C mother board

Open4337-C μC/OS-II (Ⅰ)

Open4337-C μC/OS-II (Ⅱ)

Open4337-C μC/OS-II (Ⅲ)

Open4337-C μC/OS-II (Ⅳ)

LPC MCU Core Board
MCU core board Core4337

LPC MCU Core Board
MCU core board Core4337

LPC Development Board
Connecting to a debugger

LPC Development Board
Connecting to various peripherals

USB Device
Connecting to USB device

RS232 Board
Connecting to RS232 Board

RS485 Board
Connecting to RS485 Board

SN65HVD230 CAN Board
Connecting to CAN Board

8 Push Buttons
Connecting to 8 Push Buttons

5 IO Keypad
Connecting to 5 IO Keypad

AD Keypad
Connecting to AD Keypad

Analog Test Board
Test Board on the AD/DA port

Connecting to FRAM Board

I2C cascading x3
Multi I2C peripheral Module connected to the I2C bus

Micro SD Storage Board
Connecting to Micro SD Storage Board

AT45DBXX DataFlash Board
Connecting to DataFlash Board

NandFlash Board
Connecting to NandFlash Board

NRF24L01 RF Board
Connecting to NRF24L01 RF Board

DP83848 Ethernet Board
Connecting to Ethernet Board

VS1003B MP3 Board
Connecting to VS1003B MP3 Board

UDA1380 Board
Connecting to UDA1380 Board

Connecting to any accessory board
Connecting to any accessory board you need

The Open4337-C supports programming via UART bootloader
The Open4337-C does NOT integrate any debugging function, a debugger is required.

JTAG/SWD interfaces

The figure 1, and 2 show the header pinouts of JTAG/SWD interface

Figure 1. JTAG Header Pinout
JTAG Header Pinout

Figure 2. SWD Header Pinout
SWD Header Pinout

Development Resources

  • Related software (KEIL etc.)

  • Examples in C

  • Schematic (PDF)

  • LPC Cortex-M3/M4 development documentations (Datasheet etc.)

Wiki: www.utsource.net/wiki/Open4337-C

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