Datasheet

Interface
The interface chip handles the USB connection, and is used for flashing new code to the
micro:bit, sending and receiving serial data back and forth to your main computer.!
USB communications
The micro:bit has an on board USB communications stack, that is built into the firmware
of the interface chip. This stack provides the ability to drag and drop files onto the
MICROBIT drive in order to load code into the application processor. It also allows serial
data to be streamed to and from the micro:bit application processor over USB to an
external host computer, and supports the CMSIS-DAP protocol for host debugging of
application programs.!
Onboard Peripherals budget
90mA
Battery connector
JST X2B-PH-SM4-TB
Max current provided via edge
connector
190mA
More Info
Power supply
item
details
item
details
Model
MKL27Z256VFM4
Core variant:
Arm Cortex-M0+
Flash ROM
256KB (128kB reserved for future use as storage)
RAM
16KB
Speed
48MHz
Debug capabilities
SWD
More Info
DAPLink,$KL27 reference manual$KL27 data sheet
item
details
Connector
USB micro, MCR-B-S-RA-SMT-CS5-TR
USB version
2.0 Full Speed device
Speed
12Mbit/sec
USB classes supported
Mass Storage Class (MSC)
9
© Micro:bit Educational Foundation 2020