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參數資料
| 型號： | DEMOMPR031 |
| 廠商： | Freescale Semiconductor |
| 文件頁數： | 12/33頁 |
| 文件大?。?/td> | 0K |
| 描述： | BOARD DEMO FOR MPR031 CTLR |
| 產品培訓模塊： | MPR03x - Low-Power Proximity Sensors |
| 視頻文件： | DEMOPR031 Touch Sensor |
| 標準包裝： | 1 |
| 傳感器類型： | 觸摸，電容式 |
| 接口： | I²C |
| 電源電壓： | 1.71 V ~ 2.75 V |
| 嵌入式： | 否 |
| 已供物品： | 板 |
| 已用 IC / 零件： | MPR031 |
| 產品目錄頁面： | 2808 (CN2011-ZH PDF) |
| 相關產品： | MPR031EPR2DKR-ND - IC CTLR TOUCH SENSOR 8-DFN MPR031EPR2CT-ND - IC CTLR TOUCH SENSOR 8-DFN MPR031EPR2TR-ND - IC CTLR TOUCH SENSOR 8-DFN |
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MPR03X
Sensors
2
Freescale Semiconductor
1
Device Overview
1.1
Introduction
MPR03X is a small outline, low profile, low voltage touch sensor controller in a 2 mm x 2 mm
DFN which manages up to three
touch pad electrodes. An I2C interface communicates with the host controller at data rates up to 400 kbits/sec. An optional
interrupt output advises the host of electrode status changes. The interrupt output is a multiplexed with the third electrode output,
so using the interrupt output reduces the number of electrode inputs to two. The MPR03X includes three levels of input signal
filtering to detect pad input condition changes due to touch without any processing by the application.
1.2
Internal Block Diagram
Figure 2. Functional Block Diagram
ELE0
ELE1
ELE2
0
1
2
012
Current SourceMultiplexor
In
pu
t
Sou
rc
e
M
ult
ipl
ex
or
Iref
3
Set Source Current
Mirror
Iset
Select Chan
Select
Chan
Set Input Channel
Sel
Set Grounded
Electrodes
10 Bit ADC
Enable
Convert
Clock
Data
10
ADC Result
8MHz
Start Conversion
Shutdown
2
4
2
Interrupt
Controller
IC
Interface
32 kHz
Oscillator
User
Registers
Debounced
Results
Magnitude
Comparator
Average
Filtered
Debounce
Result
Debounce Filter Registers
4 x Max Registers
4 x SumRegisters
4xMin Registers
SDA
SCL
IRQ SET
CLR
Shutdown
Debounce
Interval
Debounce
Count
Sample
Interval
Sample
Count
Debounce
and
Sample
Counters
Average
Filtered
Sample
Result
Sample Filter Registers
Max Register
SumRegister
Min Register
Set Source Current
Set Input Channel
ADC Result
8MHz
Start Conversion
Shutdown
8MHz
Oscillator
Shutdown
ADC Controller
Traffic
SDA
SCL
IRQ
32 kHz8 MHz
Set Grounded
Electrodes
Number of
Electrodes
Un-Touched
Baseline
Filter
0V
REXT
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