LPC2212 Philips Semiconductors (Acquired by NXP), LPC2212 Datasheet - Page 22

• Manufacturer Part Number: LPC2212
• Description: 16/32-bit Arm Microcontrollers; 128/256 KB Isp/iap Flash With 10-bit ADC And External Memory Interfacebased on a 16/32 Bit ARM7TDMI-STM Cpu With Real-time Emulation And Embedded Trace Support, Together With 128/256 Kilobytes (kB) of Embedded High Spe
• Manufacturer: Philips Semiconductors (Acquired by NXP)

Philips Semiconductors
9397 750 12747
Preliminary data
6.17.1 Features
6.18.1 Features
6.17 Watchdog timer
6.18 Real time clock
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.
The Real Time Clock (RTC) is designed to provide a set of counters to measure time
when normal or idle operating mode is selected. The RTC has been designed to use
little power, making it suitable for battery powered systems where the CPU is not
running continuously (Idle mode).
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Internally resets chip if not periodically reloaded.
Debug mode.
Enabled by software but requires a hardware reset or a Watchdog reset/interrupt to
be disabled.
Incorrect/Incomplete feed sequence causes reset/interrupt if enabled.
Flag to indicate Watchdog reset.
Programmable 32-bit timer with internal pre-scaler.
Selectable time period from (t
t
Measures the passage of time to maintain a calendar and clock.
Ultra Low Power design to support battery powered systems.
Provides Seconds, Minutes, Hours, Day of Month, Month, Year, Day of Week, and
Day of Year.
Programmable Reference Clock Divider allows adjustment of the RTC to match
various crystal frequencies.
pclk
– Set LOW on match.
– Set HIGH on match.
– Toggle on match.
– Do nothing on match.
4.
Rev. 01 — 02 February 2004
16/32-bit ARM microcontrollers with external memory interface
pclk
256
4) to (t
LPC2212/LPC2214
pclk
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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32
4) in multiples of
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