Mokosmart Mk01-kit User manual

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MOKO TECHNOLOGY LTD.

User Guide

MK01-KIT Evaluation Board

Version 1.2

MK01-KIT Evaluation Board User Guide V1.2

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Revision History

Version

Data

Notes

Contributor(s)

V1.0

Oct 15 2020

Initial version

Kevin Huang

V1.1

Jan 18 2021

Update the picture and description of the development board

Victor Chow

V1.2

Sep 18 2021

Modify some parameters errors

Kevin Huang

MK01-KIT Evaluation Board User Guide V1.2

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Table of Contents

Revision History ..........................................................................................................................................1

1. Overview ............................................................................................................................................3

2. Circuit Design .....................................................................................................................................4

Block Diagram.............................................................................................................................................. 4

Schematic .................................................................................................................................................... 4

3. Functional Blocks ...............................................................................................................................5

Power Supply............................................................................................................................................... 5

Inserting the Coin Cell Battery........................................................................................................................... 6

Removing the Coin Cell Battery ......................................................................................................................... 6

Current Measurement................................................................................................................................. 6

Pin Assignment............................................................................................................................................ 7

Switch Positions........................................................................................................................................... 8

NFC .................................................................................................................................................................... 8

DC/DC Regulator Setup...................................................................................................................................... 9

External 32.768 kHz Crystal Oscillator ............................................................................................................... 9

Jumper Position......................................................................................................................................... 10

USB to UART .............................................................................................................................................. 10

4. Packaging .........................................................................................................................................11

Contact.....................................................................................................................................................12

MK01-KIT Evaluation Board User Guide V1.2

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1. Overview

MK01-KIT evaluation board is a universal development tool that highlights the capabilities of the MOKO MK01 series

(MK01A & MK01B) Bluetooth Module. This board provides you with a quick and easy way to develop MK01 series

module or even Nordic® nRF52832 solution.

The evaluation board is a full featured evaluation board that provides a complete I/O pin of MK01 series Bluetooth

Module, on-board programming and debugging pins (SWD), external 32.768 kHz crystal setup, DC/DC regulator setup,

power port over USB Type-C cable, NFC antenna FPC connector, one RESET button, one user button and one user RGB-

LED.

The board also provides the option to be powered from a CR2032 coin cell battery and have current sense hole to allow

for convenient current measurements.

Figure 1: MK01-KIT evaluation board (top view)

Figure 2: MK01-KIT evaluation board (bottom view)

MK01-KIT Evaluation Board User Guide V1.2

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2. Circuit Design

Block Diagram

Figure 3: Block diagram of MK01-KIT

Schematic

Figure 4: Schematic of MK01-KIT

MK01-KIT Evaluation Board User Guide V1.2

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3. Functional Blocks

Figure 5: The functional blocks of MK01-KIT

Descriptions:

●J1: 2x5 1.27mm pitch vertical pin header

●J2 and J3: 2x5 2.54mm pitch vertical female header

●J4: 1x2 2.54mm pitch vertical female header

●W1-W9: 1x2 2.54mm pitch vertical pin header and all jumper caps are mounted

●LED1: 5V indicator

●LED2: 3.3V indicator

●SW5 (push button) for module Reset (active low)

●SW6 (push button) for expand function

●SW1-SW4, SW7 (toggle switch) for circuit selection

Power Supply

There are three power supply options:

●5V from the USB Type-C

●3.3V power output

●CR2032 coin cell battery

MK01-KIT Evaluation Board User Guide V1.2

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Figure 6: Interfaces of power supply for MK01-KIT

Note: The power sources are routed through a set of diodes (D3 and D4 in schematic) for reverse voltage protection,

where the circuit is supplied from the source with the highest voltage.

Inserting the Coin Cell Battery

To insert the coin cell, follow these steps:

Step 1: Push the coin cell against positive contact spring of holder (on the back side of the

evaluation board). The coin cell sits below the positive contact spring (as shown

with arrow).

Step 2: Push the coin cell down into the holder.

Removing the Coin Cell Battery

Use an insulated tool in the position shown in picture below, to gently remove the coin cell

from the coin cell holder (as shown with arrow). This is the correct method to remove coin-

cell from holder.

Note: Due to tight fit of coin cell in the coin-cell holder, care should be taken prevent

damage to the holder.

Current Measurement

To measure the current, please take off the jumper cap of W1, and connect an

ampere-meter between the pins of W1 to monitor the current directly.

Note:

1. Do not use the USB connector to power the board during current

measurements. Power the board from a coin cell battery, or use an external

power supply on the external supply connector J4.

2. The current measurements will become unreliable when a serial terminal is connected to the virtual COM port.

MK01-KIT Evaluation Board User Guide V1.2

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Pin Assignment

Figure 7: J1 – J4 of MK01-KIT

Table 1: The pin assignments of J1 – J4

Pin No.

J1

J2

J3

J4 (3.3V output)

1

VCC

P01

3.3V (+)

2

SWDIO

GND

GND (-)

3

GND

P02/AIN0

4

SWDCLK

P30/AIN6

5

GND

P20/EN

P03/AIN1

6

NC

P18

P00

7

NC

P05/AIN3

P15

8

NC

P21/RST

P04/AIN2

9

GND

P09

P16

10

P0.21/RST

P10

P14

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Switch Positions

Figure 8: SW1 – SW4 of MK01-KIT

Table 2: Use of SW1 – SW4

Part Name

Description

State

Selected Circuit

SW1

Toggle switch

Left

P09/P10

Right

NFC circuit

SW2

Toggle switch

Left

P00/P01

Right

External 32.768kHz crystal circuit

SW3

Toggle switch

Left

Default internal LDO regulator setup

Right

External DC/DC regulator setup

SW4

Toggle switch

Left

P20

Right

P20/EN, pull-down to low level

NFC

MK01-KIT evaluation board has a FPC connector, which can be inserted into a NFC antenna.

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Figure 9: FPC NFC antenna inserted to MK01-KIT

To connect the NFC circuit to the MK01 series module, toggle the SW2 toggle switch to the right. If the SW2 toggle

switch is toggled to left, P09 and P10 will be enabled as GPIO pins on J2.

Figure 10: Toggle to Left – GPIO enabled

Figure 11: Toggle to Right – NFC enabled

DC/DC Regulator Setup

The MK01 series module uses LDO regulator setup by default. Connect 10uH and 15nH inductors to the module on the

MK01-KIT evaluation board through DCC and DEC4 pins to enable DC/DC regulator setup.

To connect the DC/DC regulator setup circuit to the MK01 series module, toggle the SW3 toggle switch to the right. If

toggle the SW3 toggle switch to the left, DCC and DEC4 will be enabled as GPIO pins on J3.

External 32.768 kHz Crystal Oscillator

The MK01 series module on-chip 32.768kHz RC oscillator provides the standard accuracy of ±250 ppm.

The MK01-KIT evaluation board connects an external higher accuracy (±20 ppm) 32.768 kHz crystal to the P00 and P01

pins of MK01 series module.

This provides improved protocol timing and helps with radio power consumption in the system standby doze/deep

sleep modes by reducing the time that the Rx window must be open.

MOKOSmart MK01-KIT User manual

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