參數(shù)資料
型號: LPC11U12FBD48/201,
廠商: NXP Semiconductors
文件頁數(shù): 53/72頁
文件大小: 0K
描述: IC MCU 32BIT 16K 48LQFP
產(chǎn)品培訓(xùn)模塊: Code Density for LPC11xx
標準包裝: 250
系列: LPC11Uxx
核心處理器: ARM? Cortex?-M0
芯體尺寸: 32-位
速度: 50MHz
連通性: I²C,Microwire,智能卡,SPI,SSP,UART/USART,USB
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 40
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: 閃存
RAM 容量: 6K x 8
電壓 - 電源 (Vcc/Vdd): 1.8 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: 568-8582
LPC11U1X
All information provided in this document is subject to legal disclaimers.
NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 2.2 — 11 March 2014
57 of 72
NXP Semiconductors
LPC11U1x
32-bit ARM Cortex-M0 microcontroller
11.5 Reset pad configuration
11.6 ADC effective input impedance
A simplified diagram of the ADC input channels can be used to determine the effective
input impedance seen from an external voltage source. See Figure 32.
The effective input impedance, Rin, seen by the external voltage source, VEXT, is the
parallel impedance of ((1/fs x Cia) + Rmux + Rsw) and (1/fs x Cio), and can be calculated
using Equation 1 with
fs = sampling frequency
Cia = ADC analog input capacitance
Rmux = analog mux resistance
Rsw = switch resistance
Cio = pin capacitance
(1)
Fig 31. Reset pad configuration
VSS
reset
002aaf274
VDD
Rpu
ESD
20 ns RC
GLITCH FILTER
PIN
Fig 32. ADC input channel
Cia
Rs
VSS
VEXT
002aah615
ADC
COMPARATOR
ADC Block
Rin
Cio
Rmux
Rsw
Source
<2 k
Ω
<1.3 k
Ω
R
in
1
f
s
C
ia
------------------
R
mux
R
sw
++
1
f
s
C
io
------------------
=
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