BLUENRG-LP datasheet(20/72 Pages) STMICROELECTRONICS

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Half-duplex single wire communication

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Local interconnection network (LIN) master/slave capability

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Smart card mode, ISO 7816 compliant protocol

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IrDA (infrared data association) SIR ENDEC specifications

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Modem operations (CTS/RTS)

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RS485 driver enable

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Multiprocessor communications

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SPI-like communication capability

High speed data communication is possible by using DMA (direct memory access) for multibuffer configuration.

1.21

LPUART

LPUART is a UART which allows bidirectional UART communications. It supports half-duplex single wire

communications and modem operations (CTS/RTS). It also supports multiprocessor communications. DMA (direct

memory access) can be used for data transmission/reception.

1.22

Serial peripheral interface (SPI)

The BlueNRG-LP has three SPI interfaces (SPI1, SPI2, SPI3) allowing communication up to 32 Mbit/s in both

master and slave modes. The SPI peripheral supports:

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Master or slave operation

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Multimaster support

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Full-duplex synchronous transfers on three lines

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Half-duplex synchronous transfer on two lines (with bidirectional data line)

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Simplex synchronous transfers on two lines (with unidirectional data line)

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Serial communication with external devices

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NSS management by hardware or software for both master and slave: dynamic change of master/slave

operations

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SPI Motorola support

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SPI TI mode support

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Hardware CRC feature for reliable communication

All SPI interfaces can be served by the DMA controller.

1.23

Inter-IC sound (I2S)

The BlueNRG-LP SPI interfaces: SPI2 and SPI3 support the I2S protocol. The I2S interface can operate in slave

or master mode with full duplex and half-duplex communication. It can address four different audio standards:

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Philips I2S standard

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MSB-justified standards (left-justified)

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LSB-justified standards (right-justified)

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PCM standard.

The I2S interfaces DMA capability for transmission and reception.

1.24

Serial wire debug port

The BlueNRG-LP embeds an ARM SWD interface that allows interactive debugging and programming of the

device. The interface is composed of only two pins: SWDIO and SWCLK. The enhanced debugging features for

developers allow up to 4 breakpoints and up to 2 watchpoints.

1.25

TX and RX event alert

The BlueNRG-LP is provided with the TX_SEQUENCE and RX_SEQUENCE signals which alert, respectively,

transmission and reception activities.

A signal can be enabled for TX and RX on two pins, through alternate functions:

BlueNRG-LP

LPUART

DS13282 - Rev 2

page 20/72

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