LPC1850 datasheet(73/142 Pages) NXP

73 / 142 page

LPC1850_30_20_10

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Preliminary data sheet

Rev. 2.2 — 9 September 2011

73 of 142

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

• Power management remote wake-up frame and magic packet detection

• Supports both full-duplex and half-duplex operation

– Supports CSMA/CD Protocol for half-duplex operation.

– Supports IEEE 802.3x flow control for full-duplex operation.

– Optional forwarding of received pause control frames to the user application in

full-duplex operation.

– Back-pressure support for half-duplex operation.

– Automatic transmission of zero-quanta pause frame on deassertion of flow control

input in full-duplex operation.

• Support for IEEE 1588 time stamping and IEEE 1588 advanced time stamping (IEEE

1588-2008 v2).

7.14 Digital serial peripherals

7.14.1 UART

Remark: The LPC1850/30/20/10 contain one UART with standard transmit and receive

data lines.

UART1 also provides a full modem control handshake interface and support for

RS-485/9-bit mode allowing both software address detection and automatic address

detection using 9-bit mode.

UART1 includes a fractional baud rate generator. Standard baud rates such as 115200 Bd

can be achieved with any crystal frequency above 2 MHz.

7.14.1.1

Features

• Maximum UART data bit rate of <tbd> MBit/s.

• 16 B Receive and Transmit FIFOs.

• Register locations conform to 16C550 industry standard.

• Receiver FIFO trigger points at 1 B, 4 B, 8 B, and 14 B.

• Built-in fractional baud rate generator covering wide range of baud rates without a

need for external crystals of particular values.

• Auto baud capabilities and FIFO control mechanism that enables software flow

control implementation.

• Equipped with standard modem interface signals. This module also provides full

support for hardware flow control (auto-CTS/RTS).

• Support for RS-485/9-bit/EIA-485 mode (UART1).

• DMA support.

7.14.2 USART

Remark: The LPC1850/30/20/10 contain three USARTs. In addition to standard transmit

and receive data lines, the USARTs support a synchronous mode and a smart card mode.

The USARTs include a fractional baud rate generator. Standard baud rates such as

115200 Bd can be achieved with any crystal frequency above 2 MHz.

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