This content relates to a deprecated version of Mbed
Mbed 2 is now deprecated. For the latest version please see the Mbed OS documentation.
This diagram shows the commonly used interfaces and their pinout locations. Note that all the numbered pins (p5-p30) can also be used as DigitalIn and DigitalOut interfaces. Some pinout options are not shown here; for a full details, see the technical reference below for the full pinout specification
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.
- 40-pin DIP package
- 0.1. pitch, 0.9. pin spacing
- 54mm x 26mm
- 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
- 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
Power and Logic Levels¶
The microcontroller I/O is all 3.3v logic, but 5v tolerant. A digital pin can drive 40mA, up to a total of 400mA.