LPC2194 datasheet(18/33 Pages) PHILIPS

18 / 33 page

Philips Semiconductors

LPC2194

Single-chip 16/32-bit microcontrollers

Preliminary data

Rev. 01 — 06 February 2004

18 of 33

9397 750 12757

I2C implemented in LPC2194 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 LPC2194 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.

6.16 General purpose timers

The Timer is designed to count cycles of the peripheral clock (PCLK) and optionally

generate interrupts or perform other actions at speciﬁed timer values, based on four

match registers. It also includes four capture inputs to trap the timer value when an

input signal transitions, optionally generating an interrupt. Multiple pins can be

selected to perform a single capture or match function, providing an application with

‘or’ and ‘and’, as well as ‘broadcast’ functions among them.

6.16.1

Features

• A 32-bit Timer/Counter with a programmable 32-bit Prescaler.

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