6.7 Quad-SPI NOR Flash memory
64-Mbit Quad-SPI NOR Flash memory is connected to the Quad-SPI interface of the STM32L4S5VI
microcontroller.
6.8 Virtual COM port
The serial interface USART1 is directly available as a Virtual COM port of the PC connected to the ST-LINK/V2-1
USB connector CN7. The Virtual COM port settings are configured with 115200 bps, 8-bit data, no parity, one-stop
bit, and no flow control.
6.9 RF modules
Three RF interfaces are available on the B-L4S5I-IOT01A board:
1. Bluetooth
®
(V4.1 compliant) SPBTLE-RF module,
2. 802.11 b/g/n compliant Wi‑Fi
®
module ISM43362-M3G-L44 from Inventek Systems,
3. Dynamic NFC Tag based on ST25DV04K with its printed NFC antenna (Double layer inductive antenna
etched on the PCB).
6.9.1
Bluetooth
®
(V4.1 compliant) SPBTLE-RF module
The ST SPBTLE-RF module (M1) is implemented on the top side of the B-L4S5I-IOT01A Discovery kit for the IoT
node.
The SPBTLE-RF is an easy to use Bluetooth
®
smart master-slave network processor module, compliant with
Bluetooth
®
V4.1. The SPBTLE-RF B-Smart module supports multiple roles simultaneously, and it can act at the
same time as Bluetooth
®
Smart sensor and hub device.
The entire Bluetooth
®
Smart stack and protocol are embedded into the SPBTLE-RF B-Smart module. The
external host application processor, where the application resides, is connected to the SPBTLE-RF B-Smart
module through a standard SPI interface (SPI3 of STM32L4S5VI).
The SPBTLE-RF B-SmarT module provides a complete RF platform in a tiny form factor (Footprint of this module
is 13.5 mm x 11.5 mm). Radio, antenna, high frequency, and LPO oscillators are integrated to offer a certified
solution to optimize the time to market of the final applications.
Figure 13. SPBTLE-RF module
UM2708
Quad-SPI NOR Flash memory
UM2708 - Rev 1
page 17/43
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