参数资料
| 型号： | MPR031EPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 28/33页 |
| 文件大小： | 0K |
| 描述： | IC CTLR TOUCH SENSOR 8-DFN |
| 产品培训模块： | MPR03x - Low-Power Proximity Sensors |
| 特色产品： | MPR03x Proximity Capacitive Touch Sensor Controllers |
| 标准包装： | 1 |
| 类型： | 电容性 |
| 触摸面板接口： | 2 线 |
| 评估套件： | 可供 |
| 数据接口： | I²C，串行 |
| 数据速率/采样率 (SPS，BPS)： | 400k |
| 电源电压： | 1.71 V ~ 2.75 V |
| 电流 - 电源： | 43µA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-UFDFN |
| 供应商设备封装： | 8-QFN-D（2x2） |
| 包装： | 标准包装 |
| 产品目录页面： | 2808 (CN2011-ZH PDF) |
| 配用： | KITMPR03XEVM-ND - KIT EVAL FOR MPR03X DEMOMPR031-ND - BOARD DEMO FOR MPR031 CTLR |
| 其它名称： | MPR031EPR2DKR |
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MPR03X
Sensors
4
Freescale Semiconductor
Figure 4. Recommended System Connections Schematic
2.3
Serial Interface
The MPR03X uses an I2C Serial Interface. The I2C protocol implementation and the specifics of communicating with the Touch
Sensor Controller are detailed in the following sections.
2.3.1
Serial-Addressing
The MPR03X operates as a slave that sends and receives data through an I2C 2-wire interface. The interface uses a Serial Data
Line (SDA) and a Serial Clock Line (SCL) to achieve bi-directional communication between master(s) and slave(s). A master
(typically a microcontroller) initiates all data transfers to and from the MPR03X, and it generates the SCL clock that synchronizes
the data transfer.
The MPR03X SDA line operates as both an input and an open-drain output. A pull-up resistor, typically 4.7k
, is required on
SDA. The MPR03X SCL line operates only as an input. A pull-up resistor, typically 4.7k
, is required on SCL if there are multiple
masters on the 2-wire interface, or if the master in a single-master system has an open-drain SCL output.
Each transmission consists of a START condition (Figure 5) sent by a master, followed by the MPR03X’s 7-bit slave address plus
R/W bit, a register address byte, one or more data bytes, and finally a STOP condition.
Figure 5. Wire Serial Interface Timing Details
2.3.2
Start and Stop Conditions
Both SCL and SDA remain high when the interface is not busy. A master signals the beginning of a transmission with a
START (S) condition by transitioning SDA from high to low while SCL is high. When the master has finished communicating with
the slave, it issues a STOP (P) condition by transitioning SDA from low to high while SCL is high. The bus is then free for another
transmission.
Figure 6. Bit Transfer
SCL
SDA
tLOW
tHIGH
tF
tR
tHD STA
tHD DAT
tHD STA
tSU DAT
tSU STA
tBUF
tSU STO
START
CONDITION
STOP
CONDITION
REPEATED START
CONDITION
START
CONDITION
DATA LINE STABLE
DATA VALID
CHANGE OF
DATA ALLOWED
SDA
SCL
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MPR031EPR2 | 制造商:Freescale Semiconductor 功能描述:IC CAPACITIVE TOUCH SENSOR FN-8 |
| MPR031EPR2-CUT TAPE | 制造商:Freescale 功能描述:MPR031 Series 2.75 V 8 ? Proximity Capacitive Touch Sensor Controller - UDFN-8 |
| MPR032 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Proximity Capacitive Touch Sensor Controller |
| MPR032EP | 制造商:Freescale Semiconductor 功能描述:CAPACITIVE TOUCH SENSOR 8-PIN UDFN BULK - Bulk |
| MPR032EPR2 | 功能描述:电容触摸传感器 DFN TOUCH PAD RoHS:否 制造商:Microchip Technology 电源电压: 通道数量: 封装 / 箱体: 尺寸: 温度范围: |
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