Technical Reference

The technical details of the mbed NXP LPC1768 Microcontroller.

This mbed Microcontroller is based on a Cortex-M3 Core running at 96MHz, with 512KB FLASH, 64KB RAM and a load of interfaces including Ethernet, USB Device, CAN, SPI, I2C and other I/O.

For a good summary, see the Quick Reference.

Package

• 40-pin DIP package
• 0.1. pitch, 0.9. pin spacing
• 44mm x 26mm

Power

• Powered by USB or 4.5v - 9.0v appiled to VIN
• <200mA (~100mA with Ethernet disabled)
• Real-time clock battery backup input VB
• 1.8v - 3.3v Keeps Real-time clock running
• Requires 27uA, can be supplied by a coin cell
• 3.3v regulated output on VOUT to power peripherals
• 5.0v from USB available on VU (only available when USB is connected!)
• Current limited to 500mA
• Digital IO pins are 3.3v, 40mA each, 400mA max total

Pins

• Vin - External Power supply to the board
  • 4.5v-9v, 100mA + external circuits powered through the Microcontroller
• Vb - Battery backup input for Real Time Clock
  • 1.8v-3.3v, 30uA
• nR - Active-low reset pin with identical functionality to the reset button.
  • Pull up resistor is on the board, so it can be driven with an open collector
• IF+/- - Reserved for Future use

Schematic

• mbed NXP LPC1768

About the NXP LPC1768 MCU

The LPC176x MCU series from NXP use a 32-Bit Cortex-M3 core running at up to 100MHz, with up to 512KB of zero-wait state on-chip flash.

For full details, see the NXP LPC176x User Manual.

Other good links:

• For more on the LPC23xx series, see the NXP LPC17xx Website .
• A good in-depth training video can be found on the LPC23xx Training page.
• The NXP LPCZone has additional training and developer information.