參數(shù)資料
型號(hào)： LPC2420FET208
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 微控制器/微處理器
英文描述： Flashless 16-bit-32-bit microcontroller; Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
中文描述： 16-BIT, 72 MHz, RISC MICROCONTROLLER, PBGA208
封裝： 15 X 15 MM, 0.70 MM HEIGHT, PLASTIC, SOT-950-1, TFBGA-208
文件頁(yè)數(shù)： 75/86頁(yè)
文件大小： 496K
代理商： LPC2420FET208
LPC2420_60
All information provided in this document is subject to legal disclaimers.
NXP B.V. 2011. All rights reserved.
Product data sheet
Rev. 6.1 — 22 September 2011
75 of 86
NXP Semiconductors
LPC2420/2460
Flashless 16-bit/32-bit microcontroller
Table 20.
14.4 RTC 32 kHz oscillator component selection
The RTC external oscillator circuit is shown in
Figure 31
. Since the feedback resistance is
integrated on chip, only a crystal, the capacitances C
X1
and C
X2
need to be connected
externally to the microcontroller.
Table 21
gives the crystal parameters that should be used. C
L
is the typical load
capacitance of the crystal and is usually specified by the crystal manufacturer. The actual
C
L
influences oscillation frequency. When using a crystal that is manufactured for a
different load capacitance, the circuit will oscillate at a slightly different frequency
(depending on the quality of the crystal) compared to the specified one. Therefore for an
accurate time reference it is advised to use the load capacitors as specified in
Table 21
that belong to a specific C
L
. The value of external capacitances C
X1
and C
X2
specified in
this table are calculated from the internal parasitic capacitances and the C
L
. Parasitics
from PCB and package are not taken into account.
Table 21.
Crystal load capacitance
C
L
11 pF
13 pF
15 pF
Recommended values for C
X1
/C
X2
in oscillation mode (crystal and external
components parameters): high frequency mode
Fundamental oscillation
frequency F
OSC
capacitance C
L
15 MHz to 20 MHz
10 pF
20 pF
20 MHz to 25 MHz
10 pF
20 pF
Crystal load
Maximum crystal
series resistance R
S
< 180
< 100
< 160
< 80
External load
capacitors C
X1
, C
X2
18 pF, 18 pF
39 pF, 39 pF
18 pF, 18 pF
39 pF, 39 pF
Fig 31. RTC oscillator modes and models: oscillation mode of operation and external
crystal model used for C
X1
/C
X2
evaluation
Recommended values for the RTC external 32 kHz oscillator C
X1
/C
X2
components
Maximum crystal series
resistance R
S
< 100 k
< 100 k
< 100 k
External load capacitors C
X1
/C
X2
18 pF, 18 pF
22 pF, 22 pF
27 pF, 27 pF
002aaf495
LPC2xxx
RTCX1
RTCX2
CX2
CX1
32 kHz XTAL
=
CL
CP
RS
L
相關(guān)PDF資料
PDF描述
LPC2460FBD208 Flashless 16-bit-32-bit microcontroller; Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
LPC2460FET208 Flashless 16-bit-32-bit microcontroller; Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
LPC2458FET180 Single-chip 16-bit-32-bit micro; 512 kB flash, Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
LPC2468FBD208 Single-chip 16-bit-32-bit micro; 512 kB flash, Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
LPC2468FET208 Single-chip 16-bit-32-bit micro; 512 kB flash, Ethernet, CAN, ISP-IAP, USB 2.0 device-host-OTG, external memory interface
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LPC2420FET208,551 功能描述:ARM微控制器 - MCU 16b ROMLess 160I/O 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
LPC2458 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single-chip 16-bit/32-bit micro; 512 kB flash, Ethernet, CAN, ISP/IAP, USB 2.0 device/host/OTG, external memory interface
LPC2458_11 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single-chip 16-bit/32-bit micro; 512 kB flash, Ethernet, CAN, ISP/IAP, USB 2.0 device/host/OTG, external memory interface
LPC2458FET180 制造商:PHILIPS 制造商全稱(chēng):NXP Semiconductors 功能描述:Single-chip 16-bit/32-bit micro; 512 kB flash, Ethernet, CAN, ISP/IAP, USB 2.0 device/host/OTG, external memory interface
LPC2458FET180,551 功能描述:ARM微控制器 - MCU ARM7 512KF/USBH/ENET 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
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*