LPC4350 datasheet(84/149 Pages) PHILIPS

84 / 149 page

LPC4350_30_20_10

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Objective data sheet

Rev. 3.1 — 5 January 2012

84 of 149

NXP Semiconductors

LPC4350/30/20/10

32-bit ARM Cortex-M4/M0 microcontroller

• Optional warning interrupt can be generated at a programmable time prior to

watchdog time-out.

• Enabled by software but requires a hardware reset or a watchdog reset/interrupt to be

disabled.

• 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 (Tcy(WDCLK)  256  4) to (Tcy(WDCLK)  224  4) in

multiples of Tcy(WDCLK)  4.

7.20 Analog peripherals

7.20.1 Analog-to-Digital Converter (ADC0/1)

7.20.1.1

Features

• 10-bit successive approximation analog to digital converter.

• Input multiplexing among 8 pins.

• Power-down mode.

• Measurement range 0 to VDDA.

• Sampling frequency up to 400 kSamples/s.

• Burst conversion mode for single or multiple inputs.

• Optional conversion on transition on ADCTRIG0 or ADCTRIG1 pins, combined timer

outputs 8 or 15, or the PWM output MCOA2.

• Individual result registers for each A/D channel to reduce interrupt overhead.

• DMA support.

7.20.2 Digital-to-Analog Converter (DAC)

7.20.2.1

Features

• 10-bit resolution

• Monotonic by design (resistor string architecture)

• Controllable conversion speed

• Low power consumption

7.21 Peripherals in the RTC power domain

7.21.1 RTC

The Real Time Clock (RTC) is a set of counters for measuring time when system power is

on, and optionally when it is off. It uses very little power when its registers are not being

accessed by the CPU, especially reduced power modes. The RTC is clocked by a

separate 32 kHz oscillator that produces a 1 Hz internal time reference. The RTC is

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