BLUENRG-332VC datasheet(20/67 Pages) STMICROELECTRONICS

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2.19

Inter-integrated circuit interface (I2C)

The BlueNRG-LPS embeds one I2Cs. The I2C bus interface handles communications between the microcontroller

and the serial I2C bus. It controls all I2C bus-specific sequencing, protocol, arbitration and timing.

The I2C peripheral supports:

•

I2C bus specification and user manual rev. 5 compatibilities:

–

Slave and master modes

–

Multimaster capability

–

Standard-mode (Sm), with a bitrate up to 100 kbit/s

–

Fast-mode (Fm), with a bitrate up to 400 kbit/s

–

Fast-mode Plus (fm+), with a bitrate up to 1 Mbit/s and 20 mA output driver I/Os

–

7-bit and 10-bit addressing mode

–

Multiple 7-bit slave addresses (2 addresses, 1 with configurable mask)

–

All 7-bit address acknowledge mode

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General call

–

Programmable setup and hold times

–

Easy to use event management

–

Optional clock stretching

–

Software reset

•

System management Bus (SMBus) specification rev 2.0 compatibility:

–

Hardware PEC (Packet Error Checking) generation and verification with ACK control

–

Address resolution protocol (ARP) support

–

Host and device support

–

SMBus alert

–

Timeouts and idle condition detection

•

Power system management protocol (PMBusTM) specification rev 1.1 compatibility

•

Independent clock: a choice of independent clock sources allowing the I2C communication speed to be

independent from the PCLK reprogramming

•

Programmable analog and digital noise filters

•

1-byte buffer with DMA capability

2.20

Universal synchronous/asynchronous receiver transmitter (USART)

USART offers flexible full-duplex data exchange with external equipment requiring an industry standard NRZ

asynchronous serial data format. USART is able to communicate with a speed up to 2 Mbit/s. Furthermore,

USART is able to detect and automatically set its own baud rate, based on the reception of a single character.

The USART peripheral supports:

•

Synchronous one-way communication

•

Half-duplex single wire communication

•

Local interconnection network (LIN) master/slave capability

•

Smart card mode, ISO 7816 compliant protocol

•

IrDA (infrared data association) SIR ENDEC specifications

•

Modem operations (CTS/RTS)

•

RS485 driver enable

•

Multiprocessor communications

•

SPI-like communication capability

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

2.21

LPUART

The device embeds one low-power UART, enabling asynchronous serial communication with minimum power

consumption. The LPUART supports half duplex single wire communication and modem operations (CTS/RTS),

allowing multiprocessor communication.

BlueNRG-LPS

Inter-integrated circuit interface (I2C)

DS13819 - Rev 4

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