參數(shù)資料
型號(hào)： LPC2214FBD144
廠商： NXP Semiconductors N.V.
元件分類： 數(shù)學(xué)處理器
英文描述： Single-chip 16-32-bit ARM microcontrollers; 128-256 kB ISP-IAP flash with 10-bit ADC and external memory interface
封裝： LPC2212FBD144/01<SOT486-1 (LQFP144)|<<http://www.nxp.com/packages/SOT486-1.html<1<Always Pb-free,;LPC2214FBD144/01<SOT486-1 (LQFP144)|<<http://www.nxp.com/packages/SOT486
文件頁(yè)數(shù)： 22/47頁(yè)
文件大?。?/td> 337K
代理商： LPC2214FBD144
LPC2212_2214
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 5 — 14 June 2011
22 of 47
NXP Semiconductors
LPC2212/2214
Single-chip 16/32-bit ARM microcontrollers
Pulse period and width can be any number of timer counts. This allows complete
flexibility in the trade-off between resolution and repetition rate. All PWM outputs will
occur at the same repetition rate.
Double edge controlled PWM outputs can be programmed to be either positive going
or negative going pulses.
Match register updates are synchronized with pulse outputs to prevent generation of
erroneous pulses. Software must ‘release’ new match values before they can become
effective.
May be used as a standard timer if the PWM mode is not enabled.
A 32-bit Timer/Counter with a programmable 32-bit Prescaler.
6.18 System control
6.18.1
Crystal oscillator
The oscillator supports crystals in the range of 1 MHz to 30 MHz. The oscillator output
frequency is called f
osc
and the ARM processor clock frequency is referred to as CCLK for
purposes of rate equations, etc. f
osc
and CCLK are the same value unless the PLL is
running and connected. Refer to
Section 6.18.2 “PLL”
for additional information.
6.18.2
PLL
The PLL accepts an input clock frequency in the range of 10 MHz to 25 MHz. The input
frequency is multiplied up into the range of 10 MHz to 60 MHz with a Current Controlled
Oscillator (CCO). The multiplier can be an integer value from 1 to 32 (in practice, the
multiplier value cannot be higher than 6 on this family of microcontrollers due to the upper
frequency limit of the CPU). The CCO operates in the range of 156 MHz to 320 MHz, so
there is an additional divider in the loop to keep the CCO within its frequency range while
the PLL is providing the desired output frequency. The output divider may be set to divide
by 2, 4, 8, or 16 to produce the output clock. Since the minimum output divider value is 2,
it is insured that the PLL output has a 50 % duty cycle. The PLL is turned off and
bypassed following a chip Reset and may be enabled by software. The program must
configure and activate the PLL, wait for the PLL to Lock, then connect to the PLL as a
clock source. The PLL settling time is 100
s.
6.18.3
Reset and wake-up timer
Reset has two sources on the LPC2212/2214: the RESET pin and Watchdog Reset. The
RESET pin is a Schmitt trigger input pin with an additional glitch filter. Assertion of chip
Reset by any source starts the Wake-up Timer (see Wake-up Timer description below),
causing the internal chip reset to remain asserted until the external Reset is de-asserted,
the oscillator is running, a fixed number of clocks have passed, and the on-chip flash
controller has completed its initialization.
When the internal Reset is removed, the processor begins executing at address 0, which
is the Reset vector. At that point, all of the processor and peripheral registers have been
initialized to predetermined values.
The Wake-up Timer ensures that the oscillator and other analog functions required for
chip operation are fully functional before the processor is allowed to execute instructions.
This is important at power on, all types of Reset, and whenever any of the aforementioned
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LPC2214FBD144,551 功能描述:ARM微控制器 - MCU PREF PART LPC2214FBD144/01-S RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時(shí)鐘頻率:72 MHz 程序存儲(chǔ)器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
LPC2214FBD144,557 制造商:NXP Semiconductors 功能描述:IC,MCU ARM7, 144LQFP
LPC2214FBD144/00 制造商:NXP Semiconductors 功能描述:16/32BIT ARM7 MCU 128K FLASH SMD
LPC2214FBD144/00,5 制造商:NXP Semiconductors 功能描述:MCU 16-Bit/32-Bit LPC2000 ARM7TDMI-S RISC 256KB Flash 1.8V/3.3V 144-Pin LQFP Tray
LPC2214FBD144/00,551 制造商:NXP 功能描述:0
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