OM11049,598 NXP Semiconductors, OM11049,598 Datasheet - Page 25

• Manufacturer Part Number: OM11049,598
• Description: MCU, MPU & DSP Development Tools LPC1114 Demo Boards Cortex M0
• Manufacturer: NXP Semiconductors

Specifications of OM11049,598

• Processor To Be Evaluated: LPC1114
• Processor Series: LPC11xx
• Interface Type: I2C, SPI
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Operating Supply Voltage: 3.3 V
• Tool Type: Demonstration Board
• Core Architecture: ARM
• Cpu Core: ARM Cortex M0
• Data Bus Width: 32 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
LPC1111_12_13_14
Product data sheet
7.14.1 Features
7.13 System tick timer
7.14 Watchdog timer
The ARM Cortex-M0 includes a system tick timer (SYSTICK) that is intended to generate
a dedicated SYSTICK exception at a fixed time interval (typically 10 ms).
The purpose of the watchdog is to reset the microcontroller within a selectable time
period.
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Counter or timer operation.
One capture channel per timer, that can take a snapshot of the timer value when an
input signal transitions. A capture event may also generate an interrupt.
Four match registers per timer 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.
Up to four external outputs corresponding to match registers, with the following
capabilities:
– Set LOW on match.
– Set HIGH on match.
– Toggle on match.
– Do nothing on match.
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 24-bit timer with internal prescaler.
Selectable time period from (T
multiples of T
The Watchdog Clock (WDCLK) source can be selected from the Internal RC oscillator
(IRC), the Watchdog oscillator, or the main clock. This gives a wide range of potential
timing choices of Watchdog operation under different power reduction conditions. It
also provides the ability to run the WDT from an entirely internal source that is not
dependent on an external crystal and its associated components and wiring for
increased reliability.
All information provided in this document is subject to legal disclaimers.
cy(WDCLK)
Rev. 4 — 10 February 2011
× 4.
cy(WDCLK)
× 256 × 4) to (T
32-bit ARM Cortex-M0 microcontroller
LPC1111/12/13/14
cy(WDCLK)
× 2
© NXP B.V. 2011. All rights reserved.
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× 4) in
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