LPC2141 PHILIPS [NXP Semiconductors], LPC2141 Datasheet - Page 18

• Manufacturer Part Number: 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
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
9397 750 14985
Preliminary data sheet
6.13.1 Features
6.14.1 Features
6.15.1 Features
6.14 SSP serial I/O controller
6.15 General purpose timers/external event counters
The LPC2141/42/44/46/48 each contain one SSP. The SSP controller is capable of
operation on a SPI, 4-wire SSI, or Microwire bus. It can interact with multiple masters and
slaves on the bus. However, 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 data
frames of 4 bits to 16 bits of data flowing from the master to the slave and from the slave
to the master. Often only one of these data flows carries meaningful data.
The Timer/Counter is designed to count cycles of the peripheral clock (PCLK) or an
externally supplied clock and optionally generate interrupts or perform other actions at
specified timer values, based on four match registers. It also includes four capture inputs
to trap the timer value when an input signal transitions, optionally generating an interrupt.
Multiple pins can be selected to perform a single capture or match function, providing an
application with ‘or’ and ‘and’, as well as ‘broadcast’ functions among them.
The LPC2141/42/44/46/48 can count external events on one of the capture inputs if the
minimum external pulse is equal or longer than a period of the PCLK. In this configuration,
unused capture lines can be selected as regular timer capture inputs, or used as external
interrupts.
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Compliant with SPI specification.
Synchronous, Serial, Full Duplex, Communication.
Combined SPI master and slave.
Maximum data bit rate of one eighth of the input clock rate.
Compatible with Motorola’s SPI, TI’s 4-wire SSI and National Semiconductor’s
Microwire buses.
Synchronous serial communication.
Master or slave operation.
8-frame FIFOs for both transmit and receive.
Four bits to 16 bits per frame.
A 32-bit timer/counter with a programmable 32-bit prescaler.
External event counter or timer operation.
Four 32-bit capture channels per timer/counter that can take a snapshot of the timer
value when an input signal transitions. A capture event may also optionally generate
an interrupt.
Four 32-bit match registers that allow:
– Continuous operation with optional interrupt generation on match.
– Stop timer on match with optional interrupt generation.
Rev. 01 — 3 October 2005
LPC2141/42/44/46/48
Single-chip 16-bit/32-bit microcontrollers
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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