Data Sheet

MK02 Bluetooth Module

Datasheet

www.mokoblue.com

5. Interfaces

5.1 Power Supply

Regulated power for the MK02 is required. The input voltage VCC range should be 1.7V to 3.6V.

Suitable decoupling must be provided by external decoupling circuitry (10uF and 0.1uF). It can

reduce the noise from power supply and increase power stability.

5.2 System Function Interfaces

5.2.1 GPIO

The general purpose I/O is organized as one port with up to 30 I/Os enabling access and control of

up to 30 pins through one port. Each GPIO can be accessed individually with the following user

configurable features:

• Input/output direction

• Output drive strength

• Internal pull-up and pull-down resistors

• Wake-up from high or low level triggers on all pins

• Trigger interrupt on all pins

• All pins can be used by the PPI task/event system; the maximum number of pins that can be

interfaced through the PPI at the same time is limited by the number of GPIOTE channels

• All pins can be individually configured to carry serial interface or quadrature demodulator

signals

• All pins can be configured as PWM signal

5.2.2 Two-wire Interface (I

C Compatible)

The two-wire interface can communicate with a bi-directional wired-AND bus with two lines (SCL,

SDA). The protocol makes it possible to interconnect up to 127 individually addressable devices. The

interface is capable of clock stretching, supporting data rates of 100kbps ,250kbps and 400kbps. The

module has 2 TWI ports and they properties like following table.

Instance

Master/Slave

TWI 0

Master

TWI 1

Master