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Part Name
Description
LPC1500 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
Manufacturer
LPC1500
32-bit ARM Cortex-M3 microcontroller; up to 256 kB flash and 36 kB SRAM; FS USB, CAN, RTC, SPI, USART, I2C
NXP Semiconductors.
LPC1500 Datasheet PDF : 107 Pages
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NXP Semiconductors
LPC15xx
32-bit ARM Cortex-M3 microcontroller
8.34 Clock generation
IRC
system oscillator
watchdog oscillator
MAINCLKSELA
(main clock select A)
RTC oscillator
32 kHz
main clock
IRC
system oscillator
MAINCLKSELB
(main clock select B)
SYSTEM PLL
SYSPLLCLKSEL
(system PLL clock select)
IRC
system oscillator
USB PLL
USBPLLCLKSEL
(USB PLL clock select)
IRC
system oscillator
SCT PLL
SCTPLLCLKSEL
(SCT PLL clock select)
SYSTEM CLOCK
system clock
DIVIDER
CPU, system control,
PMU
n
memories,
peripheral clocks
SYSAHBCLKCTRLn
(AHB clock enable)
USART PERIPHERAL
CLOCK DIVIDER
IRC
system oscillator
SYSTICK PERIPHERAL
CLOCK DIVIDER
ARM core
SYSTICK
FRACTIONAL RATE
GENERATOR
USART[n:0]
IOCONCLKDIV
CLOCK DIVIDER
IOCON digital
glitch filter
ARM TRACE CLOCK
CLOCK DIVIDER
ARM trace
USB 48 MHz CLOCK
DIVIDER
USB
USBCLKSEL
(USB clock select)
IRC
SCT
ASYNC ADC CLOCK
DIVIDER
ADC
ADCASYNCCLKSEL
(clock select)
IRC
system oscillator
watchdog oscillator
watchdog oscillator
Fig 14. Clock generation
CLKOUTSELA
(CLKOUT clock select A)
RTC oscillator 32 kHz
CLKOUT PIN CLOCK
DIVIDER
CLKOUTSELB
(CLKOUT clock select B)
CLKOUT pin
WWDT
aaa-010875
LPC15XX
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 29 April 2015
© NXP Semiconductors N.V. 2015. All rights reserved.
45 of 107
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