STM32F103RCT7 datasheet(21/130 Pages) STMICROELECTRONICS

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STM32F103xC, STM32F103xD, STM32F103xE

Description

Doc ID 14611 Rev 8

21/130

2.3.19

Universal synchronous/asynchronous receiver transmitters (USARTs)

The STM32F103xC, STM32F103xD and STM32F103xE performance line embeds three

universal synchronous/asynchronous receiver transmitters (USART1, USART2 and

USART3) and two universal asynchronous receiver transmitters (UART4 and UART5).

These five interfaces provide asynchronous communication, IrDA SIR ENDEC support,

multiprocessor communication mode, single-wire half-duplex communication mode and

have LIN Master/Slave capability.

The USART1 interface is able to communicate at speeds of up to 4.5 Mbit/s. The other

available interfaces communicate at up to 2.25 Mbit/s.

USART1, USART2 and USART3 also provide hardware management of the CTS and RTS

signals, Smart Card mode (ISO 7816 compliant) and SPI-like communication capability. All

interfaces can be served by the DMA controller except for UART5.

2.3.20

Serial peripheral interface (SPI)

Up to three SPIs are able to communicate up to 18 Mbits/s in slave and master modes in

full-duplex and simplex communication modes. The 3-bit prescaler gives 8 master mode

frequencies and the frame is configurable to 8 bits or 16 bits. The hardware CRC

generation/verification supports basic SD Card/MMC modes.

All SPIs can be served by the DMA controller.

2.3.21

Inter-integrated sound (I2S)

Two standard I2S interfaces (multiplexed with SPI2 and SPI3) are available, that can be

operated in master or slave mode. These interfaces can be configured to operate with 16/32

bit resolution, as input or output channels. Audio sampling frequencies from 8 kHz up to

48 kHz are supported. When either or both of the I2S interfaces is/are configured in master

mode, the master clock can be output to the external DAC/CODEC at 256 times the

sampling frequency.

2.3.22

SDIO

An SD/SDIO/MMC host interface is available, that supports MultiMediaCard System

Specification Version 4.2 in three different databus modes: 1-bit (default), 4-bit and 8-bit.

The interface allows data transfer at up to 48 MHz in 8-bit mode, and is compliant with SD

Memory Card Specifications Version 2.0.

The SDIO Card Specification Version 2.0 is also supported with two different databus

modes: 1-bit (default) and 4-bit.

The current version supports only one SD/SDIO/MMC4.2 card at any one time and a stack

of MMC4.1 or previous.

In addition to SD/SDIO/MMC, this interface is also fully compliant with the CE-ATA digital

protocol Rev1.1.

2.3.23

Controller area network (CAN)

The CAN is compliant with specifications 2.0A and B (active) with a bit rate up to 1 Mbit/s. It

can receive and transmit standard frames with 11-bit identifiers as well as extended frames

with 29-bit identifiers. It has three transmit mailboxes, two receive FIFOs with 3 stages and

14 scalable filter banks.

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