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LPC1342 Datasheet(PDF) 19 Page - NXP Semiconductors

Part # LPC1342
Description  32-bit ARM Cortex-M3 microcontroller; up to 32 kB flash and 8 kB SRAM; USB device
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

LPC1342 Datasheet(HTML) 19 Page - NXP Semiconductors

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LPC1311_13_42_43_2
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 02 — 6 May 2010
19 of 60
NXP Semiconductors
LPC1311/13/42/43
32-bit ARM Cortex-M3 microcontroller
The UART includes a fractional baud rate generator. Standard baud rates such as
115200 Bd can be achieved with any crystal frequency above 2 MHz.
7.10.1 Features
Maximum UART data bit rate of 4.5 MBit/s.
16-byte 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.
Fractional divider for baud rate control, auto baud capabilities and FIFO control
mechanism that enables software flow control implementation.
Support for RS-485/9-bit mode.
Support for modem control.
7.11 SSP serial I/O controller
The LPC1311/13/42/43 contain one SSP controller. The SSP controller is capable of
operation on a SSP, 4-wire SSI, or Microwire bus. It can interact with multiple masters and
slaves on the bus. Only a single master and a single slave can communicate on the bus
during a given data transfer. The SSP supports full duplex transfers, with frames of 4 bits
to 16 bits of data flowing from the master to the slave and from the slave to the master. In
practice, often only one of these data flows carries meaningful data.
7.11.1 Features
Maximum SSP speed of 36 Mbit/s (master) or 6 Mbit/s (slave)
Compatible with Motorola SPI, 4-wire Texas Instruments SSI, and National
Semiconductor Microwire buses
Synchronous serial communication
Master or slave operation
8-frame FIFOs for both transmit and receive
4-bit to 16-bit frame
7.12 I2C-bus serial I/O controller
The LPC1311/13/42/43 contain one I2C-bus controller.
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 is a multi-master bus and can be
controlled by more than one bus master connected to it.


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