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| 型号： | MMA7660FCT |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 12/35页 |
| 文件大小： | 0K |
| 描述： | ACCELEROMETER 3X3 DGTL 10-DFN |
| 特色产品： | MMA7660 Digital Output Accelerometer |
| 标准包装： | 490 |
| 轴： | X，Y，Z |
| 加速范围： | ±1.5g |
| 灵敏度： | 21.33 计数/g |
| 电源电压： | 2.4 V ~ 3.6 V |
| 输出类型： | 数字 |
| 接口： | I²C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-VFDFN |
| 供应商设备封装： | 10-DFN（3x3） |
| 产品目录页面： | 2805 (CN2011-ZH PDF) |
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Orientation Detection
Orientation Detection Logic
MMA7660FC gives the customer the capability to do orientation detection for such applications as Portrait/Landscape in
Mobile Phone/PDA/ PMP. The tilt orientation of the device is in 3 dimensions and is identified in its last known static position. This
enables a product to set its display orientation appropriately to either portrait/landscape mode, or to turn off the display if the
product is placed upside down. The sensor provides six different positions including: Left, Right, Up, Down, Back, and Front,
shown in Table 7 . In Active Mode the data is processed and updates the orientation positions in the TILT (0x03) register. At each
measurement interval, it computes new values for Left, Right, Up, Down, Back, and Front but it does not automatically update
these bits in the TILT (0x03) register. These values are updated depending on the debounce filter settings (SR Register 0x08)
configured by the customer.
In order to give the customer the ability to configure the debounce filter, specific to there application, they can change the
following bits in the SR (0x08) register, FILT [2:0]. Please see below for a more detailed explanation of how the FILT [2:0] works
in conjunction with updating the TILT (0x03) register:
? If FILT [2:0] = 000, then the new values for Left, Right, Up, Down, Back, and Front are updated in the TILT (0x03) register
(PoLa [2:0] and BaFro [1:0]) after every reading without any further analysis.
? If FILT [2:0] = 001 – 111, then the sensor requires the computed values for Left, Right, Up, Down, Back, and Front to be the
same from 1-7 consecutive readings (depending on the value in FILT [2:0], before updating the values stored in TILT (0x03)
register (PoLa [2:0] and BaFro [1:0]). The debounce counter is reset after a mismatched reading or the TILT (0x03) register
is updated (if the orientation condition is met).
Table 7. Orientation Detection Logic of when Interrupt will Occur
Orientation
Xg
Yg
Zg
Shake
|X| > +1.3g
or
|Y| > +1.3g
or
|Z| > +1.3g
Up
Down
Right
Left
Back
Front
|Z| < 0.8g and |X| > |Y| and X < 0
|Z| < 0.8g and |X| > |Y| and X > 0
|Z| < 0.8g and |Y| > |X| and Y < 0
|Z| < 0.8g and |Y| > |X| and Y > 0
Front
Up
Z < -0.25g
Z > 0.25g
Left
Right
Down
Back
Figure 6. Orientation Detection Logic in 3-Dimensional Space
MMA7660FC
Sensors
Freescale Semiconductor, Inc.
12
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| MMA7660FCT | 制造商:Freescale Semiconductor 功能描述:IC 3 AXIS ACCELEROMETER ?1.5G DFN-10 |
| MMA8104EG | 功能描述:加速计 - 板上安装 SOURCE ONLY RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| MMA8104EGR2 | 功能描述:加速计 - 板上安装 Z-AXIS 40G W/CAP BOND RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| MMA8104KEG | 功能描述:加速计 - 板上安装 SOURCE ONLY RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
| MMA8104KEGR2 | 功能描述:加速计 - 板上安装 Z-AXIS 40G W/CAP BOND RoHS:否 制造商:Murata 传感轴:Double 加速:12 g 灵敏度: 封装 / 箱体: 输出类型:Analog 数字输出 - 位数:11 bit 电源电压-最大:5.25 V 电源电压-最小:4.75 V 电源电流:4 mA 最大工作温度:+ 125 C 最小工作温度:- 40 C |
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