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
17
© Copyright 2020 Laird Connectivity, Inc..
All Rights Reserved
Americas: +1-800-492-2320
Europe: +44-1628-858-940
Hong Kong: +852 2923 0610
Recommended Operating Parameters Notes:
Note 1
4.7 uF internal to module on VDD. The internal DCDC convertor or LDO is decided by the underlying BLE stack.
Note 2
This is the maximum VDD or VDD_HV ripple or noise (at any frequency) that does not disturb the radio.
Note 3
The on-board power-on reset circuitry may not function properly for rise times longer than the specified maximum.
Note 4
BL654 power supply options:
▪ Option 1 – 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 range 1.7V
to 3.6V range to BL654 VDD and VDD_HV pins.
OR
▪ Option 2 – High voltage mode power supply mode (using BL654 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 range 2.5V to 5.5V range to BL654 VDD_HV pin. BL654
VDD pin left unconnected.
Nordic Errata 197 and 202 related to the use of VDD_HV DCDC convertor, for details refer to
http://infocenter.nordicsemi.com/pdf/nRF52840_Rev_1_Errata_v1.1.pdf. Nordic Errata 202 means no
external current draw (from VDD pin) is allowed during power up and VDD_HV rise time (to 3V) is below 1
millisecond.
▪ For either option, if you use USB interface then the BL654 VBUS pin must be connected to external supply
within the range 4.35V to 5.5V. When using the BL654 VBUS pin, you MUST externally fit a 4.7uF to
ground.
Table 4: Signal levels for interface, SIO
Parameter
Min
Typ
Max
Unit
V
IH
Input high voltage
0.7 VDD
VDD
V
V
IL
Input low voltage
VSS
0.3 x VDD
V
V
OH
Output high voltage
(std. drive, 0.5mA) (Note 1)
(high-drive, 3mA) (Note 1)
(high-drive, 5mA) (Note 2)
VDD -0.4
VDD -0.4
VDD -0.4
VDD
VDD
VDD
V
V
V
OL
Output low voltage
(std. drive, 0.5mA) (Note 1)
(high-drive, 3mA) (Note 1)
(high-drive, 5mA) (Note 2)
VSS
VSS
VSS
VSS+0.4
VSS+0.4
VSS+0.4
V
V
V
OL
Current at VSS+0.4V, Output set low
(std. drive, 0.5mA) (Note 1)
(high-drive, 3mA) (Note 1)
(high-drive, 5mA) (Note 2)
1
3
6
2
-
10
4
-
15
mA
mA
mA
V
OL
Current at VDD -0.4, Output set low
(std. drive, 0.5mA) (Note 1)
(high-drive, 3mA) (Note 1)
(high-drive, 5mA) (Note 2)
1
3
6
2
-
9
4
-
14
mA
mA
mA
Pull up resistance
11
13
16
kΩ
Pull down resistance
11
13
16
kΩ