LPC1850 datasheet(75/142 Pages) NXP

75 / 142 page

LPC1850_30_20_10

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Preliminary data sheet

Rev. 2.2 — 9 September 2011

75 of 142

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

7.14.4.1

Features

• I2C0 is a standard I2C compliant bus interface with open-drain pins. I2C0 also

supports Fast mode plus with bit rates up to 1 Mbit/s.

• I2C1 uses standard I/O pins with bit rates of up to 400 kbit/s (Fast I2C-bus).

• 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 can be used for test and diagnostic purposes.

• All I2C-bus controllers support multiple address recognition and a bus monitor mode.

7.14.5 I2S interface

Remark: The LPC1850/30/20/10 contain two I2S interfaces.

The I2S-bus provides a standard communication interface for digital audio applications.

The I2S-bus specification defines a 3-wire serial bus using one data line, one clock line,

and one word select signal. The basic I2S-bus connection has one master, which is

always the master, and one slave. The I2S-bus interface provides a separate transmit and

receive channel, each of which can operate as either a master or a slave.

7.14.5.1

Features

• The interface has separate input/output channels each of which can operate in master

or slave mode.

• Capable of handling 8-bit, 16-bit, and 32-bit word sizes.

• Mono and stereo audio data supported.

• The sampling frequency can range from 16 kHz to 192 kHz (16, 22.05, 32, 44.1, 48,

96, 192) kHz.

• Support for an audio master clock.

• Configurable word select period in master mode (separately for I2S-bus input and

output).

• Two 8-word FIFO data buffers are provided, one for transmit and one for receive.

• Generates interrupt requests when buffer levels cross a programmable boundary.

• Two DMA requests, controlled by programmable buffer levels. These are connected

to the GPDMA block.

• Controls include reset, stop and mute options separately for I2S-bus input and I2S-bus

output.

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