MCB1114 Keil, MCB1114 Datasheet - Page 24

• Manufacturer Part Number: MCB1114
• Description: BOARD EVALUATION FOR NXP LPC1114
• Manufacturer: Keil

Specifications of MCB1114

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
LPC1111_12_13_14_0
Objective data sheet
Fig 6.
watchdog oscilllator
watchdog oscillator
system oscillator
IRC oscillator
IRC oscillator
LPC1111/12/13/14 clocking generation block diagram
(system PLL clock select)
7.15.1 Crystal oscillators
SYSPLLCLKSEL
7.15 Clocking and power control
The LPC1111/12/13/14 include three independent oscillators. These are the system
oscillator, the Internal RC oscillator (IRC), and the Watchdog oscillator. Each oscillator can
be used for more than one purpose as required in a particular application.
Following reset, the LPC1111/12/13/14 will operate from the Internal RC oscillator until
switched by software. This allows systems to operate without any external crystal and the
bootloader code to operate at a known frequency.
See
Figure 6
SYSTEM PLL
(main clock select)
MAINCLKSEL
for an overview of the LPC1111/12/13/14 clock generation.
main clock
Rev. 00.11 — 13 November 2009
watchdog oscillator
watchdog oscillator
system oscillator
SYSTEM CLOCK
IRC oscillator
IRC oscillator
DIVIDER
(WDT clock update enable)
(CLKOUT update enable)
CLKOUTUEN
WDTUEN
system clock
LPC1111/12/13/14
AHBCLKCTRL[1:18]
(AHB clock enable)
CLKOUT PIN CLOCK
UART PERIPHERAL
SPI0 PERIPHERAL
SPI1 PERIPHERAL
SYSTICK TIMER
CLOCK DIVIDER
CLOCK DIVIDER
CLOCK DIVIDER
CLOCK DIVIDER
18
WDT CLOCK
DIVIDER
DIVIDER
© NXP B.V. 2009. All rights reserved.
AHB clocks 1 to 18
(memories
and peripherals)
AHB clock 0
(system)
SPI0
UART
SPI1
SYSTICK
timer
WDT
CLKOUT pin
002aae514
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