参数资料
型号: LPC11U24FBD64/401
厂商: NXP Semiconductors
文件页数: 51/74页
文件大小: 0K
描述: IC MCU USB 64LQFP
产品培训模块: Code Density for LPC11xx
标准包装: 160
系列: LPC11Uxx
核心处理器: ARM? Cortex?-M0
芯体尺寸: 32-位
速度: 50MHz
连通性: I²C,Microwire,SPI,SSI,SSP,UART/USART,USB
外围设备: 欠压检测/复位,POR,WDT
输入/输出数: 54
程序存储器容量: 32KB(32K x 8)
程序存储器类型: 闪存
EEPROM 大小: 4K x 8
RAM 容量: 10K x 8
电压 - 电源 (Vcc/Vdd): 1.8 V ~ 3.6 V
数据转换器: A/D 8x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-LQFP
包装: 托盘
其它名称: 568-8461
LPC11U24FBD64/401,551
LPC11U2X
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2014. All rights reserved.
Product data sheet
Rev. 2.2 — 11 March 2014
55 of 74
NXP Semiconductors
LPC11U2x
32-bit ARM Cortex-M0 microcontroller
11.3 XTAL Printed-Circuit Board (PCB) layout guidelines
Follow these guidelines for PCB layout:
Connect the crystal on the PCB as close as possible to the oscillator input and output
pins of the chip.
Take care that the load capacitors Cx1, Cx2, and Cx3 in case of third overtone crystal
use have a common ground plane.
Connect the external components to the ground plain.
To keep parasitics and the noise coupled in via the PCB as small as possible, keep
loops as small as possible.
Choose smaller values of Cx1 and Cx2 if parasitics of the PCB layout increase.
Table 18.
Recommended values for CX1/CX2 in oscillation mode (crystal and external
components parameters) low frequency mode
Fundamental oscillation
frequency FOSC
Crystal load
capacitance CL
Maximum crystal
series resistance RS
External load
capacitors CX1, CX2
1 MHz to 5 MHz
10 pF
< 300
18 pF, 18 pF
20 pF
< 300
39 pF, 39 pF
30 pF
< 300
57 pF, 57 pF
5 MHz to 10 MHz
10 pF
< 300
18 pF, 18 pF
20 pF
< 200
39 pF, 39 pF
30 pF
< 100
57 pF, 57 pF
10 MHz to 15 MHz
10 pF
< 160
18 pF, 18 pF
20 pF
< 60
39 pF, 39 pF
15 MHz to 20 MHz
10 pF
< 80
18 pF, 18 pF
Table 19.
Recommended values for CX1/CX2 in oscillation mode (crystal and external
components parameters) high frequency mode
Fundamental oscillation
frequency FOSC
Crystal load
capacitance CL
Maximum crystal
series resistance RS
External load
capacitors CX1, CX2
15 MHz to 20 MHz
10 pF
< 180
18 pF, 18 pF
20 pF
< 100
39 pF, 39 pF
20 MHz to 25 MHz
10 pF
< 160
18 pF, 18 pF
20 pF
< 80
39 pF, 39 pF
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