Specifications
Table Of Contents
- 1 Overview and Key Features
- 2 Specification
- 3 Hardware Specifications
- 4 Power Consumption
- 5 Functional Description
- 5.1 Power Management
- 5.2 BL654 Power Supply Options
- 5.3 Clocks and Timers
- 5.4 Radio Frequency (RF)
- 5.5 NFC
- 5.6 UART Interface
- 5.7 USB interface
- 5.8 SPI Bus
- 5.9 I2C Interface
- 5.10 General Purpose I/O, ADC, PWM and FREQ
- 5.11 nRESET pin
- 5.12 Two-Wire Interface JTAG
- 5.13 BL654 Wakeup
- 5.14 Low Power Modes
- 5.15 Temperature Sensor
- 5.16 Security/Privacy
- 5.17 Optional External 32.768 kHz crystal
- 5.18 451-00001 On-board PCB Antenna Characteristics
- 5.19 451-00003 USB BLE 5.1 Dongle Mechanical Details
- 6 Hardware Integration Suggestions
- 7 Mechanical Details
- 8 Application Note for Surface Mount Modules
- 9 Regulatory
- 10 Ordering Information
- 11 Bluetooth SIG Qualification
- 12 Additional Assistance
https://www.lairdconnect.com/wireless-
modules/bluetooth-modules/bluetooth-5-
modules/bl654-series-bluetooth-module-nfc
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The 451-00001 on-board PCB trace monopole antenna radiated performance depends on the host PCB layout.
The BL654 development board was used for BL654 development and the 451-00001 PCB antenna performance evaluation. To
obtain similar performance, follow guidelines in section PCB Layout on Host PCB for the 451-00001 to allow the on-board PCB
antenna to radiate and reduce proximity effects due to nearby host PCB GND copper or metal covers.
Unit in dBi @2440MHz
XY-plane
XZ-plane
YZ-plane
Peak
Avg
Peak
Avg
Peak
Avg
451-00001 PCB trace antenna
-1.05
-5.13
-2.49
-5.63
-1.51
-7.43
XY Plane
XZ Plaze
YZ Plane
X
Y
Y
Y
Z
X