LPC2114 查看數據表（PDF） - Philips Electronics

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LPC2114

Single-chip 16/32-bit microcontrollers; 128/256 kB ISP/IAP Flash with 10-bit ADC

Philips Electronics 

Philips Semiconductors

LPC2114/LPC2124

Single-chip 16/32-bit microcontrollers

6.14.1 Features

• Compliant with Serial Peripheral Interface (SPI) specification.

• Synchronous, Serial, Full Duplex, Communication.

• Combined SPI master and slave.

• Maximum data bit rate of one eighth of the input clock rate.

6.15 General purpose timers

The Timer is designed to count cycles of the peripheral clock (PCLK) 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.

6.15.1 Features

• A 32-bit Timer/Counter with a programmable 32-bit Prescaler.

• Four 32-bit capture channels per timer 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.

– Reset timer on match with optional interrupt generation.

• Four external outputs per timer corresponding to match registers, with the following

capabilities:

– Set LOW on match.

– Set HIGH on match.

– Toggle on match.

– Do nothing on match.

6.16 Watchdog timer

The purpose of the Watchdog is to reset the microcontroller within a reasonable

amount of time if it enters an erroneous state. When enabled, the Watchdog will

generate a system reset if the user program fails to ‘feed’ (or reload) the Watchdog

within a predetermined amount of time.

6.16.1 Features

• Internally resets chip if not periodically reloaded.

• Debug mode.

9397 750 13145

Product data

Rev. 03 — 22 December 2004

© Koninklijke Philips Electronics N.V. 2004. All rights reserved.

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