LPC2290 datasheet(21/41 Pages) PHILIPS

21 / 41 page

Philips Semiconductors

LPC2290

16/32-bit ARM microcontrollers with external memory interface

Preliminary data

Rev. 01 — 09 February 2004

21 of 41

9397 750 12874

6.14 I2C serial I/O controller

I2C is a bi-directional bus for inter-IC control using only two wires: a serial clock line

(SCL), and a serial data line (SDA). Each device is recognized by a unique address

and can operate as either a receiver-only device (e.g. an LCD driver or a transmitter

with the capability to both receive and send information (such as memory).

Transmitters and/or receivers can operate in either master or slave mode, depending

on whether the chip has to initiate a data transfer or is only addressed. I2C is a

multi-master bus, it can be controlled by more than one bus master connected to it.

I2C implemented in LPC2290 supports bit rate up to 400 kbit/s (Fast I2C).

6.14.1

Features

• Standard I2C compliant bus interface.

• Easy to conﬁgure as Master, Slave, or Master/Slave.

• Programmable clocks allow versatile rate control.

• Bidirectional data transfer between masters and slaves.

• Multi-master bus (no central master).

• Arbitration between simultaneously transmitting masters without corruption of

serial data on the bus.

• Serial clock synchronization allows devices with different bit rates to communicate

via one serial bus.

• Serial clock synchronization can be used as a handshake mechanism to suspend

and resume serial transfer.

• The I2C bus may be used for test and diagnostic purposes.

6.15 SPI serial I/O controller

The LPC2290 contains two SPIs. The SPI is a full duplex serial interface, designed to

be able to handle multiple masters and slaves connected to a given bus. Only a single

master and a single slave can communicate on the interface during a given data

transfer. During a data transfer the master always sends a byte of data to the slave,

and the slave always sends a byte of data to the master.

6.15.1

Features

• Compliant with Serial Peripheral Interface (SPI) speciﬁcation.

• Synchronous, Serial, Full Duplex, Communication.

• Combined SPI master and slave.

• Maximum data bit rate of one eighth of the input clock rate.

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