Datasheet
LPC11E6X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 1.2 — 21 May 2014 32 of 89
NXP Semiconductors
LPC11E6x
32-bit ARM Cortex-M0+ microcontroller
8.20.1 Features
• Internally resets chip if not periodically reloaded during the programmable time-out
period.
• Optional windowed operation requires reload to occur between a minimum and
maximum time period, both programmable.
• Optional warning interrupt can be generated at a programmable time before watchdog
time-out.
• Software enables the WWDT, but a hardware reset or a watchdog reset/interrupt is
required to disable the WWDT.
• Incorrect feed sequence causes reset or interrupt, if enabled.
• Flag to indicate watchdog reset.
• Programmable 24-bit timer with internal prescaler.
• Selectable time period from (T
cy(WDCLK)
256 4) to (T
cy(WDCLK)
2
24
4) in
multiples of T
cy(WDCLK)
4.
• The WatchDog Clock (WDCLK) source can be selected from the IRC or the dedicated
watchdog oscillator (WDOsc). The clock source selection provides a wide range of
potential timing choices of watchdog operation under different power conditions.
8.21 Real-Time Clock (RTC)
The RTC resides in a separate always-on voltage domain with battery back-up. The RTC
uses an independent oscillator, also located in the always-on voltage domain.
8.21.1 Features
• 32-bit, 1 Hz RTC counter and associated match register for alarm generation.
• Separate 16-bit high-resolution/wake-up timer clocked at 1 kHz for 1 ms resolution
with a more that one minute maximum time-out period.
• RTC alarm and high-resolution/wake-up timer time-out each generate independent
interrupt requests. Either time-out can wake up the part from any of the low-power
modes, including Deep power-down.
8.22 Analog-to-Digital Converter (ADC)
The ADC supports a resolution of 12 bit and fast conversion rates of up to 2 MSamples/s.
Sequences of analog-to-digital conversions can be triggered by multiple sources. Possible
trigger sources are the counter/timer match outputs and capture inputs and the ARM
TXEV.
The ADC includes a hardware threshold compare function with zero-crossing detection.
8.22.1 Features
• 12-bit successive approximation analog to digital converter.
• 12-bit conversion rate of up to 2 MSamples/s.
• Temperature sensor voltage output selectable as internal voltage source for
channel 0.
• Two configurable conversion sequences with independent triggers.