Laird BL654PA Manual de usuario

Version 1.0

https://www.lairdconnect.com/wireless-

modules/bluetooth-modules

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Version

Date

Notes

Contributor(s)

Approver

1.0

20 Aug 2019

Initial version

Raj Khatri

Jonathan Kaye

https://www.lairdconnect.com/wireless-
modules/bluetooth-modules 
3 
© Copyright 2019 Laird. All Rights Reserved 
Americas: +1-800-492-2320 
Europe: +44-1628-858-940 
Hong Kong: +852 2923 0610 
 
1Overview .............................................................................................................................................................................4 
2Laird BL654PA Development Kit Part Numbers..................................................................................................................4 
3Package Contents...............................................................................................................................................................4 
4BL654PA Development Kit –Main Development Board......................................................................................................4 
4.1 DVK-BL654 and DVK-BL654PA Differences..............................................................................................................5 
4.2 Key Features..............................................................................................................................................................5 
5Understanding the Development Board...............................................................................................................................7 
5.1 BL654PA Default Configuration and Jumper Settings................................................................................................8 
6Functional Blocks ................................................................................................................................................................9 
6.1 Power Supply.............................................................................................................................................................9 
6.2 Reset Button ............................................................................................................................................................14 
6.3 SWD (JTAG) Interface .............................................................................................................................................15 
6.4 Four-wire UART Serial Interface ..............................................................................................................................17 
6.5 UART Mapping.........................................................................................................................................................17 
6.6 nAutoRUN Pin and Operating Modes.......................................................................................................................19 
6.7 Virtual Serial Port Modes and Over-the-Air smartBASIC App Download .................................................................20 
7Software ............................................................................................................................................................................21 
8Breakout Connector Pinouts..............................................................................................................................................22 
8.1 SIO (Special Input/Output Sockets) Breakout Connectors.......................................................................................22 
8.2 Additional Peripherals/Sensors ................................................................................................................................26 
8.2.1 Temperature Sensor...........................................................................................................................................26 
8.2.2 I2C Sensor (RTC Chip) ......................................................................................................................................28 
8.2.3 SPI Device EEPROM.........................................................................................................................................29 
8.2.4 Push Button and LED Connected to BL654PA...................................................................................................29 
8.2.5 NFC External Antenna Connector and NFC Antenna RF Matching Circuit........................................................31 
8.2.6 Optional External Serial QSPI Flash IC..............................................................................................................32 
8.2.7 Optional 32.76 kHz Crystal.................................................................................................................................33 
9Other Features ..................................................................................................................................................................34 
9.1 Current Consumption Measurement ........................................................................................................................34 
10 Additional Documentation..................................................................................................................................................35 
 

https://www.lairdconnect.com/wireless-

modules/bluetooth-modules

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The Laird BL654PA Development Kit provides a platform for rapid wireless connectivity prototyping, providing multiple options

for the development of Bluetooth Low Energy (BLE) plus Near Field Communication (NFC) applications.

The Laird BLE development kit is designed to support the rapid development of applications and software for the BL654PA

series of BLE modules featuring Laird’s innovative event driven programming language – smartBASIC. More information

regarding this product series including a detailed module user’s guide and smartBASIC user guides are available on Laird’s

BL654PA product page: https://www.lairdconnect.com/wireless-modules/bluetooth-modules/bluetooth-5-modules/bl654-pa-

series

This document is applicable to the version of development board which has PCB silk screen text DVK-BL654PA-R2.0.

Part Number

Product Description

455-00022

Development Kit for 453-00020 module –Integrated antenna

455-00023

Development Kit for the 453-00021 module –External antenna

Applicable to the following BL654PA module part numbers:

Part Number

Product Description

453-00020R or C

Bluetooth v5 PA module –Integrated antenna

453-00021R or C

Bluetooth v5 PA module –External antenna

All kits contain the following items:

Development Board

The development board has the required BL654PA module soldered onto it and exposes all

available hardware interfaces.

Power Options

▪USB cable –Type A to micro type B. The cable also provides serial communications via

the FTDI USB –RS232 converter chip on the board.

▪DC barrel plug for connection to external power supply (5.5 VDC max)

▪3x AAA battery holder fitted on underside of development board

▪Coin-cell holder (powers module only) fitted on underside of development board

Two-pin jumpers

for pin headers (5)

Five jumpers for 2.54 mm pitch headers used on BL654PA development board.

Fly leads (6)

Supplied (1 by 1 female to female jumper cable) to allow simple connection of any BL654PA

module pins (available on plated though holes or headers on J44, J47, J48, J41, J29, J1, J12,

J1, J5, J17, J21, J6 and J36).

External BLE

antenna

Supplied with development kit part # 455-00023 only.

External antenna, 2 dBi, FlexPIFA (Laird part #001-0022) with integral RF coaxial cable with 100

mm length and IPEX-4 compatible RF connector.

External NFC

antenna

Laird NFC flexi-PCB antenna –Part # 0600-00061

This section describes the BL654PA development board hardware. The BL654PA development board is delivered with the

BL654PA series module loaded with integrated smartBASIC runtime engine firmware but no onboard smartBASIC; because of

this it starts up in AT command mode by default.

Applications in smartBASIC are simple and easy to develop for any BLE application. Sample smartBASIC applications scripts

are available to download from the Laird GitHub repository on the BL654PA product page at

https://github.com/LairdCP/BL654PA-Applications.

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The BL654PA development board is a universal development tool that highlights the capabilities of the BL654PA module. The

development kit is supplied in a default configuration which should be suitable for multiple experimentation options. It also

offers several header connectors that help isolate on-board sensors and UART from the BL654PA module to create different

configurations. This allows you to test different operating scenarios.

The board allows the BL654PA series module to physically connect to a PC via the supplied USB cable for development

purposes. The development board provides USB-to-Virtual COM port conversion through a FTDI chip –part number FT232R.

Any Windows PC (XP or later) should auto-install the necessary drivers; if your PC cannot locate the drivers, you can

download them from http://www.ftdichip.com/Drivers/VCP.htm

The DVK-BL654PA development board is identical to the DVK-BL654 development board but with one modification –the PCB

footprint added for the BL654PA module.

Since the BL654PA module operating voltage range is 3.0V to 5.5V (whilst the BL654 is 1.8V to 5.5V), the following power

selection switch positions cannot be used on the DVK-BL654PA.

▪SW5 1.8V (silkscreen 1V8) position cannot be used for DVK-BL654PA.

SW5 default and ONLY valid position on DVK-BL654PA is marked with silkscreen 3V3.

Alternatively, you have the option to inject external supply voltage anywhere between 3.0V to 3.6V (for BL654PA) for the

Normal Voltage mode via J8pin1 and GND of external supply on any DVK GND location pin for example TP14.

▪SW8 2.5V (silkscreen 2V5) position cannot be used for DVK-BL654PA.

SW8 default and ONLY valid position on DVK-BL654PA is marked with silkscreen “AAA_5V5”.

Alternatively, you have the option to inject external supply voltage anywhere between 3.0V to 5.5V (BL654PA) for the

High Voltage mode via J28 pin1 and GND on J28pin2.

▪J34 Coin cell holder and SW6 coin cell (silkscreen coin-cell) position cannot be used for DVK-BL664PA.

Since the BL654PA module is high power module, coin cell (CR2032) operation is not possible (due to higher current

draw) and therefore coin cell holder J34 cannot be used on DVK-BL654PA.

The BL654PA development board has the following features:

▪BL654PA series module soldered onto the development board

▪The following power supply options for powering the development board:

–USB (micro-USB, type B)

–External DC supply (3.5-5.5V)

–AAA batteries (three AAA battery holder fitted on underside of development board)

–USB (micro-USB, type B) –For direct use of BL654PA USB interface as well

▪Powering the BL654PA module in Normal Voltage mode (OPTION1) via selection switch (SW7). Regulated 3.3V or

Regulated 1.8V via selection switch (SW5). For DVK-BL654PA SW5 default and ONLY valid position is

“3V3”(silkscreen).

Option to inject external supply voltage anywhere between 3.0V to 3.6V (for BL654PA) for the Normal Voltage mode (via

J8pin1 and GND of external supply on any DVK GND location pin for example TP14).

▪Powering the BL654PA module in High Voltage mode (OPTION2) via selection switch (SW7). Regulated 2.5V or 4.5V

(from 3x AAA battery –4.5V) via selection switch (SW8). For DVK-BL654PA SW8 default and ONLY valid position is

“AAA_5V5” (silkscreen).

Option to inject external voltage anywhere between 3.0V to 5.5V (for BL654PA) for the High Voltage mode (via J28).

▪Coin-cell Power supply option for coin-cell (CR2032) operation of the BL654PA module not possible (J34 coin-cell

holder cannot be used on DVK-BL654PA).

▪USB to UART bridge (FTDI chip)

▪BL654PA UART can be interfaced to:

–USB1 (PC) using the USB-UART bridge (FTDI chip)

–External UART source (using IO break-out connectors J1 –No-Pop, Plated Through Holes) when the development

board is powered from a DC jack or AAA batteries) or from USB1 (when jumper fitted in J35).

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–Atmel MCU by use of an analog switch to route the BL654PA UART (for those customers working with Nordic

SDK). USB2 to Atmel to Atmel UART (via open solderbridges) to BL654PA UART.

▪Current measuring options (BL654PA module only):

–Pin header (Ammeter)

–10R Series resistor for differential measurement (oscilloscope)

▪IO break-out 2.54 mm pitch pin header connectors (plated through-holes) that bring out all interfaces of the BL654PA

module –UART, SPI, QSPI, I2C, SIO [DIO or AIN (ADCs)], PWM, FREQ, NFC –and allow for plugging in external

modules/sensors.

▪Pin headers jumpers that allow the on-board sensors (I2C sensor, LEDs) to be disconnected from BL654PA module (by

removing jumpers).

▪Four on-board sensors:

–Analog output temperature sensor via header in series (no jumper by default)

–I2C device (RTC chip U16) via headers in series (no jumper by default)

–SPI device (EEPROM)

–QSPI device (Flash IC) via open solderbridges (by default)

▪Four buttons and four LEDs for user interaction

▪One reset button (via an analog switch)

▪NFC antenna connector on-board development board for use with supplied flexi-PCB NFC antenna

▪Optional external 32.768 kHz crystal oscillator and associated load capacitors. Not required for operation of the

BL654PA; is disconnected by open solder bridges by default.

▪Optional external serial (QSPI) flash IC. Not required for operation of the BL654PA; is disconnected by open solder

bridges by default.

▪Access to BL654PA JTAG –also known as Serial Wire Debug (SWD)

▪On-board SWD (JTAG) programmer circuitry (USB2 to BL654PA module SWD interface)

▪smartBASIC runtime engine FW upgrade capability:

–Via UART (using the FTDI USB1-UART)

–Via SWD (USB2 to BL654PA SWD) using on-board JTAG programmer circuitry on the BL654PA Development Kit

▪smartBASIC application upgrade capability:

–Via UART (using the FTDI USB-UART)

–Via OTA (Over-the-Air)

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Figure 1: Dev board contents and locations

Figure 2: Development board 455-00022 (fitted with 453-00020 BLE module with integrated antenna)

SW7 select

Normal (VDD) or

High (VDD_HV)

SW8 Select

(5V5_AAA ONLY)

I2C

device

U16

SPI

EEPROM

device

J41 PTH

J47 PTH

J29 PTH

4 Buttons

NFC Antenna

Connector CON2

Optional

Serial

QSPI flash

SW3 nReset

/BOOT Button

J48 PTH

FTDI-FT232R

DC/USB

Power

Source

Switch

SW4

Header J12

for nAutoRUN

J35

J1 Header Plated

Through Holes

(PTH) for UART

Temperatur

e Sensor

TP14

GND

Hook

LED2 LED1 LED3

LED 4 J37 J26

J45 J39

J5 (VSP)

Optional

32.768 kHz

Crystal

On-board

SWD

interface &

programmer

circuitry

DC Jack

5.5V DC

max input

CON1

USB1 J7 (VDD)

Current

Measurement

J9 (VDD_HV)

USB3 connector

BL654PA nRF

USB device

F USB I/F

USB2 connector

USB-SWD

interface

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Important! To ensure correct out-of-the-box configuration, the BL654PA development board switches and jumpers must

be configured as shown in

Figure 3.

Figure 3: Correct BL654PA DVK board (455-00022 or 455-00023) jumper and switch settings - 455-00022 pictured

SW7 middle position (default) for

Normal Voltage (VDD pin of

BL654PA) operation

J12 Fit Jumper

on Pins 2 & 1

SW5 default and

ONLY position

(3V3)

SW6 default and

ONLY position

(3V3/1v8)

SW11 position

right (default)

TP14 Black

Test Hook

SW4

Switch

USB1

SW8 Default and

ONLY position

(5V5_AAA)

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Figure 4 shows the BL654PA development board Power Supply block.

Figure 4: BL654PA development board power supply

Note: DVK-BL654PA SW8 default and only valid position is 5V5_AAA. SW8 position 2V5 is invalid.

DVK-BL654PA SW5 default and only valid position is 3V3. SW5 position 1V8 is invalid.

DVK-BL654PA SW6 default and only valid position is 3V3/1V8. SW6 position coin-cell is invalid.

There are five options for powering the development board:

▪USB1 USB type micro-B connector –If it requires the FTDI USB1-UART (BL654PA) path

▪USB2 USB type micro-B connector –If it requires the Atmel USB2-SWD (BL654PA) path

▪USB3 USB type micro-B connector –If it requires the USB3 to USB (BL654PA) path

▪External DC supply (2.5V-5.5V), into DC jack connector (CON1),

▪AAA batteries –Three AAA (4.5V) battery holder (J25) fitted on underside of development board

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The external power sources are fed into selection switch SW4 which allows a selection between either USB sources or the DC

jack/AAA.

All the external power sources listed above are buck-boost regulated to a fixed 5V on the development board.

The BL654PA module has the following power supply pins:

▪VDD pin (operating range of 3.0V to 3.6V) –Used for Normal Voltage mode

▪VDD_HV pin (operating range of 3.0V to 5.5V) –Used for High Voltage mode

▪VBUS pin (operating range of 4.35V to 5.5V) –Used for BL654PA USB mode

It can be powered in the following ways:

▪Option 1 –Normal voltage mode operation

Normal voltage power supply mode entered when the external supply voltage is connected to both the VDD and

VDD_HV pins (so that VDD equals VDD_HV). Connect external supply within a 3.0V to 3.6V range to the BL654PA VDD

and VDD_HV pins.

For normal voltage mode operation, the BL654PA development board power supply section generates the following:

–Regulated 3.3V

–Regulated 1.8V (SW5 position 1V8 cannot be used for BL654PA)

and then via selection switch SW5 (default is 3.3V position).

Note: For the DVK-BL654PA, SW5 position 1V8 is not valid.

▪Option 2 –High voltage mode operation

High voltage mode power supply mode (using BL654PA VDD_HV pin) entered when the external supply voltage in

ONLY connected to the VDD_HV pin and the VDD pin is not connected to any external voltage supply. Connect external

supply within a 3.0V to 5.5V range to the BL654PA VDD_HV pin. Leave the BL654PA VDD pin unconnected.

For high voltage mode operation, the BL654PA development board power supply section generates the following:

–Regulated 2.5V (SW8 position 2V5cannot be used for BL654PA)

–3 x AAA generated 4.5V (or inject external voltage into J28pin1 up to 5.5V)

and then via selection switch SW8 (default and only valid position is 5V5_AAA), you can select whether to use 2.5V or

4.5V.

Note: For the DVK-BL654PA SW8 position 2V5 is not valid.

▪Option 3 –High voltage mode with voltage via USB3

For either high voltage option, if you use the BL654PA USB interface, the BL654PA VBUS pin must be connected to an

external supply within the range of 4.35V to 5.5V.

The BL654PA development board power supply section is designed to cater to the options above. Follow these steps:

1. Set SW7 –Select one of the following three positions:

▪High voltage mode operation and BL654PA USB (connect USB cable to USB3 connector) –Top position. Source

from USB3.

▪Normal voltage mode operation –Middle position (default). Source from SW5.

▪High voltage mode operation –Bottom position. Source from SW8.

2. Depending on chosen SW7 position, select one of the following three positions:

▪Plug in USB cable into USB3 –If SW7 is set to top position.

▪SW5 (either 3.3V or 1.8V) –Default and only position for SW5 on 3V3 position for BL654PA. If SW7 set to

middle position.

▪SW8 –either 2.5V or 4.5V (3xAAA) –Default and only position on SW8 is 5V5_AAA for BL654PA position. If

SW7 set to bottom position.

Table 1 summarises the dev-board on-board power sources and switch positions.

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