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ManualsBrandsNXP SEMICONDUCTORS ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller LQFP 144 (20x20) 32-Bit Dual-Core 204 MHz I/O number 83
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LPC435X_3X_2X_1X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 4 — 19 August 2014 76 of 158
NXP Semiconductors
LPC435x/3x/2x/1x
32-bit ARM Cortex-M4/M0 microcontroller
• 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.
• Supports IEEE1588 time stamping and IEEE 1588 advanced time stamping (IEEE
1588-2008 v2).
7.19 Digital serial peripherals
7.19.1 UART1
Remark: The LPC435x/3x/2x/1x 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.
7.19.1.1 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.
• Support for RS-485/9-bit/EIA-485 mode (UART1).
• DMA support.
7.19.2 USART0/2/3
Remark: The LPC435x/3x/2x/1x contain three USARTs. In addition to standard transmit
and receive data lines, the USARTs support a synchronous 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.