參數(shù)資料
型號: LPC1226FBD48/301,1
廠商: NXP Semiconductors
文件頁數(shù): 17/61頁
文件大?。?/td> 0K
描述: MCU 32BIT 96K FLASH 8K 48-LQFP
產(chǎn)品培訓(xùn)模塊: LPC1200 Series for Industrial Control
特色產(chǎn)品: LPC122x Cortex-M0 Microcontrollers
標(biāo)準(zhǔn)包裝: 250
系列: LPC1200
核心處理器: ARM? Cortex?-M0
芯體尺寸: 32-位
速度: 45MHz
連通性: I²C,IrDA,Microwire,SPI,SSI,SSP,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,DMA,POR,WDT
輸入/輸出數(shù): 39
程序存儲器容量: 96KB(96K x 8)
程序存儲器類型: 閃存
RAM 容量: 8K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 48-LQFP
包裝: 托盤
其它名稱: 568-5161
LPC1226FBD48/301
LPC122X
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 2 — 26 August 2011
24 of 61
NXP Semiconductors
LPC122x
32-bit ARM Cortex-M0 microcontroller
7.18.1.1
Internal RC oscillator
The IRC may be used as the clock source for the WDT, 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.
Upon power-up or any chip reset, the LPC122x use the IRC as the clock source. Software
may later switch to one of the other available clock sources.
7.18.1.2
System oscillator
The system oscillator can be used as the clock source for the CPU, with or without using
the PLL.
Fig 5.
LPC122x clocking generation block diagram
SYSTEM PLL
watchdog oscillator
IRC oscillator
watchdog oscillator
system oscillator
MAINCLKSEL
(main clock select)
SYSPLLCLKSEL
CLOCK
DIVIDER
AHB clock 0
(system)
CLOCK
DIVIDER
peripheral clocks
(SSP, UART0, UART1)
RTC
WWDT
watchdog oscillator
IRC oscillator
system oscillator
CLOCK
DIVIDER
CLKOUT pin
CLKOUTUEN
(CLKOUT clock update enable)
RTC oscillator 1 kHz clock
RTC oscillator 1 Hz clock
RTC oscillator 1 Hz delayed clock
RTCOSCCTRL
WDCLKSEL
(WWDT clock select)
main clock
system clock
3
CLOCK
DIVIDER
SYSAHBCLKCTRL[1:31]
(AHB clock enable)
AHB clocks
1 to 31
(memories
and peripherals)
31
002aaf271
CLOCK
DIVIDER
peripheral clocks
(IOCONFIG glitch filter)
7
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