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| 型号： | KITMPR03XEVM |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 23/33页 |
| 文件大小： | 0K |
| 描述： | KIT EVAL FOR MPR03X |
| 产品培训模块： | MPR03x - Low-Power Proximity Sensors |
| 视频文件： | KITMPR03XEVM |
| 标准包装： | 1 |
| 传感器类型： | 触摸，电容式 |
| 接口： | I²C |
| 电源电压： | 1.71 V ~ 2.75 V |
| 嵌入式： | 是，其它 |
| 已供物品： | 4 个板，线缆，CD，样品 IC |
| 已用 IC / 零件： | MPR031 |
| 产品目录页面： | 2808 (CN2011-ZH PDF) |
| 相关产品： | 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
Freescale Semiconductor
3
2
External Signal Description
2.1
Device Pin Assignment
Table 1 shows the pin assignment for the MPR03X. For a more detailed description of the functionality of each pin, refer to the
appropriate chapter.
The package available for the MPR03X is a 2 x 2 mm 8 pin
DFN. The package and pinout is shown in Figure 3.
Figure 3. Package Pinouts
2.2
Recommended System Connections
The MPR03X Capacitive Touch Sensor Controller requires one external passive component. As shown in Table 1, the REXT line
should have a 75 k
connected from the pin to GND. This resistor needs to be 1% tolerance.
In addition to the one resistor, a bypass capacitor of 10 F should always be used between the VDD and VSS lines and a
4.7 k
pull-up resistor should be included on the IRQ. Note: This condition is when pin 8 is used for interrupt indication and not
for electrode sensing.
The remaining two connections are SCL and SDA. Depending on the specific application, each of these control lines can be used
by connecting them to a host controller. In the most minimal system, the SCL and SDA must be connected to a master I2C
interface to communicate with the MPR03X. All of the connections for the MPR03X are shown by the schematic in Figure 4.
Table 1. Device Pin Assignment
Pin
Name
Function
1SCL
I2C Serial Clock Input
2SDA
I2C Serial Data I/O
3VSS
Ground
4VDD
Positive Supply Voltage
5
REXT
Reference Resistor
Connect a 75 k
±1% resistor from REXT to V
SS
6
ELE0
Electrode 0
7
ELE1
Electrode 1
8IRQ/ELE2
Interrupt Output or Touch Electrode Input 2
IRQ is the active-low open-drain interrupt output
1
SCL
2
3
8
7
6
5
4
SDA
VSS
VDD
IRQ/ELE2
ELE1
ELE0
REXT
MPR03X
Interface
IC Serial
3
VSS
SDA
SCL
MPR03X
ELE0
ELE1
IRQ/ELE2
1
2
VSS
75k
VDD
REXT
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