UM0851 datasheet(86/245 Pages) STMICROELECTRONICS

Numer części	UM0851

Szczegółowy opis	SPEAr is a family of highly customizable ARM-based embedded

PDF	245 Pages

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Producent	STMICROELECTRONICS [STMicroelectronics]

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Communication device drivers

UM0851

86/245

Doc ID 16604 Rev 2

4.5.7

Configuration options

4.5.8

References

●

Linux-2.6.27/Documentation/i2c

●

Linux-2.6.27/drivers/i2c/chips/

4.6

SPI driver

This section describes the driver for the SPI controller embedded in SPEAr.

4.6.1

Hardware overview

The serial peripheral interface bus or SPI bus is a synchronous serial data link standard

named by Motorola that operates in full duplex mode. Devices communicate in master/slave

mode where the master device initiates the data frame. Individual slave select (chip select)

lines allow multiple slave devices. SPI is used to connect microcontrollers to sensors,

memory and peripherals.

Figure 21.

Master slave connectivity

Table 28.

I2C configuration options

Configuration option

Comment

CONFIG_I2C

Enables I2C support.

CONFIG_I2C_CHARDEV

Enables I2C device interface.

CONFIG_I2C_SPEAR

Enables SPEAr I2C hardware bus support.

UM0851 Arkusz danych(PDF) 86 Page - STMicroelectronics