– 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 BL654;
is disconnected by open solder bridges by default.
▪ Optional external serial (QSPI) flash IC. Not required for operation of the BL654; is disconnected by open solder
bridges by default.
▪ Access to BL654 JTAG – also known as Serial Wire Debug (SWD)
▪ On-board SWD (JTAG) programmer circuitry (USB2 to BL654 module SWD interface)
▪ smartBASIC runtime engine FW upgrade capability:
– Via UART (using the FTDI USB1-UART)
– Via SWD (USB2 to BL654 SWD) using on-board JTAG programmer circuitry on the BL654 Development Kit
▪ smartBASIC application upgrade capability:
– Via UART (using the FTDI USB-UART)
– Via OTA (Over-the-Air)
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