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LPC2141 Fiches technique(PDF) 17 Page - NXP Semiconductors

No de pièce LPC2141
Description  Single-chip 16-bit/32-bit microcontrollers; up to 512 kB flash with ISP/IAP, USB 2.0 full-speed device, 10-bit ADC and DAC
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Fabricant  PHILIPS [NXP Semiconductors]
Site Internet  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

LPC2141 Fiches technique(HTML) 17 Page - NXP Semiconductors

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© 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.


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