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LPC2141 Fiches technique(PDF) 17 Page - NXP Semiconductors |
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LPC2141 Fiches technique(HTML) 17 Page - NXP Semiconductors |
17 / 38 page 9397 750 14985 © Koninklijke Philips Electronics N.V. 2005. All rights reserved. Preliminary data sheet Rev. 01 — 3 October 2005 17 of 38 Philips Semiconductors LPC2141/42/44/46/48 Single-chip 16-bit/32-bit microcontrollers 6.11.1 Features • 16 byte Receive and Transmit FIFOs. • Register locations conform to ‘550 industry standard. • Receiver FIFO trigger points at 1, 4, 8, and 14 bytes • Built-in fractional baud rate generator covering wide range of baud rates without a need for external crystals of particular values. • Transmission FIFO control enables implementation of software (XON/XOFF) flow control on both UARTs. • LPC2144/46/48 UART1 equipped with standard modem interface signals. This module also provides full support for hardware flow control (auto-CTS/RTS). 6.12 I2C-bus serial I/O controller The LPC2141/42/44/46/48 each contain two I2C-bus controllers. The I2C-bus is bidirectional, for inter-IC control using only two wires: a serial clock line (SCL), and a serial data line (SDA). Each device is recognized by a unique address and can operate as either a receiver-only device (e.g., an LCD driver or a transmitter with the capability to both receive and send information (such as memory)). Transmitters and/or receivers can operate in either master or slave mode, depending on whether the chip has to initiate a data transfer or is only addressed. The I2C-bus is a multi-master bus, it can be controlled by more than one bus master connected to it. The I2C-bus implemented in LPC2141/42/44/46/48 supports bit rates up to 400 kbit/s (Fast I2C-bus). 6.12.1 Features • Compliant with standard I2C-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 can be used for test and diagnostic purposes. 6.13 SPI serial I/O controller The LPC2141/42/44/46/48 each contain one SPI controller. The SPI is a full duplex serial interface, designed 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. |
Numéro de pièce similaire - LPC2141 |
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Description similaire - LPC2141 |
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