LPC11A14FBD48/301, NXP Semiconductors, LPC11A14FBD48/301, Datasheet - Page 35

• Manufacturer Part Number: LPC11A14FBD48/301,
• Description: ARM Microcontrollers - MCU CortexM0 32bit 32KB
• Manufacturer: NXP Semiconductors

Specifications of LPC11A14FBD48/301,

• Rohs: yes
• Core: ARM Cortex M0
• Processor Series: LPC11A
• Data Bus Width: 32 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 32 KB
• Data Ram Size: 8 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 2.6 V to 3.6 V
• Package / Case: LQFP-48
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 250

NXP Semiconductors
LPC11AXX
Product data sheet
Fig 10. LPC11Axx clock generation block diagram
SysOsc
CLKIN
(system PLL clock select)
LFOsc
IRC
IRC
SYSPLLCLKSEL
7.22.1.1 Internal RC Oscillator (IRC)
7.22.1.2 Crystal Oscillator (SysOsc)
The IRC may be used as the clock source for the WWDT, and/or as the clock that drives
the PLL and subsequently the CPU. The nominal IRC frequency is 12 MHz. The IRC is
trimmed to 1 % accuracy over the entire voltage and temperature range.
The IRC can be used as a clock source for the CPU with or without using the PLL. The
IRC frequency can be boosted to a higher frequency, up to the maximum CPU operating
frequency, by the system PLL.
Upon power-up or any chip reset, the LPC11Axx use the IRC as the clock source.
Software may later switch to one of the other available clock sources.
The crystal oscillator can be used as the clock source for the CPU, with or without using
the PLL.
The SysOsc operates at frequencies of 1 MHz to 25 MHz. This frequency can be boosted
to a higher frequency, up to the maximum CPU operating frequency, by the system PLL.
SYSTEM PLL
(main clock select)
MAINCLKSEL
main clock
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 30 October 2012
SYSTEM CLOCK
DIVIDER
SysOsc
WDOsc
LFOsc
(CLKOUT update enable)
IRC
IRC
CLKOUTUEN
WDCLKSEL
system clock
32-bit ARM Cortex-M0 microcontroller
SYSCLKCTRL[1:18]
USART PERIPHERAL
CLKOUT PIN CLOCK
SSP0 PERIPHERAL
SSP1 PERIPHERAL
CLOCK DIVIDER
CLOCK DIVIDER
CLOCK DIVIDER
18
WWDT CLOCK
DIVIDER
DIVIDER
LPC11Axx
memories
and peripherals
system
© NXP B.V. 2012. All rights reserved.
SSP0
USART
SSP1
CLKOUT pin
WWDT
002aaf430
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