LPC1850_13 datasheet(74/149 Pages) NXP

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LPC1850_30_20_10

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Product data sheet

Rev. 6.1 — 7 February 2013

74 of 149

NXP Semiconductors

LPC1850/30/20/10

32-bit ARM Cortex-M3 microcontroller

7.14 Digital serial peripherals

7.14.1 UART

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 8 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.

7.14.2.1

Features

• Maximum UART data bit rate of 8 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.

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

• USART3 includes an IrDA mode to support infrared communication.

• All USARTs have DMA support.

• Support for synchronous mode at a data bit rate of up to 8 Mbit/s.

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