LPC2104 Philips Semiconductors (Acquired by NXP), LPC2104 Datasheet - Page 17

• Manufacturer Part Number: LPC2104
• Description: LPC2104/2105/2106; Single-chip 32-bit Microcontrollers; 128 KB Isp/iap Flash With 64 KB/32 KB/16 KB RAM;; Package: SOT313-2 (LQFP48)
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
9397 750 11499
Product data
6.12.1 Features
6.13.1 Features
6.12 SPI serial I/O controller
6.13 General purpose timers
6.14 Watchdog timer
The SPI is a full duplex serial interface, designed to be able 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.
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.
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.
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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.
A 32-bit Timer/Counter with a programmable 32-bit Prescaler.
Up to four (TImer 1) and three (Timer 0) 32-bit capture channels, 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:
Up to four (Timer 1) and three (Timer 0) external outputs corresponding to match
registers, with the following capabilities:
– Continuous operation with optional interrupt generation on match.
– Stop timer on match with optional interrupt generation.
– Reset timer on match with optional interrupt generation.
– Set LOW on match.
– Set HIGH on match.
– Toggle on match.
– Do nothing on match.
Rev. 02 — 11 June 2003
LPC2104/2105/2106
Single-chip 32-bit microcontrollers
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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