LPC11A11FHN33/001, NXP Semiconductors, LPC11A11FHN33/001, Datasheet - Page 35
LPC11A11FHN33/001,
Manufacturer Part Number
LPC11A11FHN33/001,
Description
ARM Microcontrollers - MCU CortexM0 32bit 8KB
Manufacturer
NXP Semiconductors
Datasheet
1.LPC11A11FHN33001.pdf
(84 pages)
Specifications of LPC11A11FHN33/001,
Rohs
yes
Core
ARM Cortex M0
Processor Series
LPC11A
Data Bus Width
32 bit
Maximum Clock Frequency
50 MHz
Program Memory Size
8 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
2.6 V to 3.6 V
Package / Case
HVQFN-33
Mounting Style
SMD/SMT
Factory Pack Quantity
260
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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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