UM11029
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© NXP Semiconductors N.V. 2017. All rights reserved.
User manual
Rev. 1.0 — 16 June 2017
6 of 515
NXP Semiconductors
UM11029
Chapter 1: LPC84x Introductory information
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Clock generation:
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Free Running Oscillator (FRO). This oscillator provides a selectable 18 MHz,
24 MHz, and 30 MHz outputs that can be used as a system clock. Also, these
outputs can be divided down to 1.125 MHz, 1.5 MHz, 1.875 MHz, 9 MHz, 12 MHz,
and15 MHz for system clock. The FRO is trimmed to ±1 % accuracy over the entire
voltage and temperature range 0 C to 70 C.
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Low power boot at 1.5 MHz using FAIM memory.
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External clock input for clock frequencies of up to 25 MHz.
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Crystal oscillator with an operating range of 1 MHz to 25 MHz.
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Low power oscillator can be used as a clock source to the watchdog timer.
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Programmable watchdog oscillator with a frequency range of 9.4 kHz to 2.3 MHz.
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PLL allows CPU operation up to the maximum CPU rate without the need for a
high-frequency crystal. May be run from the system oscillator, the external clock
input, or the internal FRO.
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Clock output function with divider that can reflect all internal clock sources.
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Power control:
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Integrated PMU (Power Management Unit) to minimize power consumption.
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Reduced power modes: sleep mode, deep-sleep mode, power-down mode, and
deep power-down mode.
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Wake-up from deep-sleep and power-down modes on activity on USART, SPI, and
I2C peripherals.
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Timer-controlled self wake-up from deep power-down mode.
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Power-On Reset (POR).
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Brownout detect (BOD).
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Unique device serial number for identification.
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Single power supply (1.8 V to 3.6 V).
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Operating temperature range -40 °C to +105 °C.
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Available in LQFP64, LQFP48, HVQFN48, and HVQFN33 packages
