收藏本站
Pins and Connections
3.3.2
Platform as a sensor hub
Figure 3-4 shows an example of the system connections when the MMA955xL platform is used as an
autonomous sensor hub. This type of connection increases the overall system efficiency as the various
sensors are handled directly by the MMA955xL device, through its master I2C bus and analog inputs.
In such a sensor-hub configuration, the MMA955xL platform processes and fuses the sensors’ data before
transferring it to the host platform, so that data is refined as higher-level information. The master CPU can
go into Sleep mode as the MMA955xL device will issue a wake-up request should any external event
require the CPU’s attention. The RGPIO8 pin (Pin 15) is typically used for wake-up requests.
Wake-up
V DD
Ferrite Bead or
10- ? F Inductor
C 4
1 ? F
V SS
C 3
0.1 ? F
V DD
16
15
14
R P3
4.7 k ?
C 1
1 ? F
C 2
0.1 ? F
1
2
13
12
Differential Output
Analog Sensor
RESETB
V DD
3
4
Sensing Platform
11
10
V SS
V SS
V DD
R P1
4.7 k ?
V SS
5
6
7
8
SDA1
9
R P4
4.7 k ?
V DD
SCL0
V DD
V DD
Digitally
MASTER
CPU
SDA0
R P2
4.7 k ?
SDL1
R P3
4.7 k ?
Interfaced
Sensors
V SS
Figure 3-4. Platform as a sensor hub
3.3.3
Power
An internal circuit powered by V DDA provides the MMA955xL platform with a power-on-reset signal. In
order for this signal to be properly recognized, it is important that V DD is powered up before, or
simultaneously with, V DDA .
The voltage potential difference between V DD and V DDA must not exceed 0.1V. The simplest way to
accomplish this is to power both pins from the same voltage source.
When using the same voltage source, some digital noise might reach the analog section. To prevent this,
connect a small inductor or ferrite bead in serial with both the VDDA and VSSA traces. Additionally, two
MMA955xL Intelligent, Motion-Sensing Platform Hardware Reference Manual, Rev. 1.0
32
Freescale Semiconductor, Inc.
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
KITMMA955XLEVM KIT EVALUATION FOR MMA955XL
KITMPL115A1EVB KIT EVALUATION FOR MPL115A1
KITMPL115A1SPI KIT EVALUATION FOR PL115A1SP1
KITMPL115A2I2C KIT EVALUATION FOR PL115A2I2C
KITMPVZ5004EVK KIT EVAL PRESSURE SENS BOARD
KN500B1/4 SWITCH KNOB STRAIGHT .50" BLACK
KN5700B1/4 SWITCH KNOB STRAIGHT .75" BLACK
KN700B1/4 SWITCH KNOB STRAIGHT .75" BLACK
相关代理商/技术参数
KITMMA9551LEVM 功能描述:加速传感器开发工具 Dev Board MMA9551L RoHS:否 制造商:Murata 工具用于评估:SCA3100-D04 加速:2 g 传感轴:Triple Axis 接口类型:SPI 工作电压:3.3 V
KITMMA955XLEVM 功能描述:加速传感器开发工具 EVM KIT FOR MMA955XL RoHS:否 制造商:Murata 工具用于评估:SCA3100-D04 加速:2 g 传感轴:Triple Axis 接口类型:SPI 工作电压:3.3 V
KITMMDS08AB32 功能描述:DEV KIT FOR 68HC908AB32 MMDS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
KITMMDS08JB8 功能描述:DEV KIT FOR 68HC908JB8 MMDS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
KITMMDS08JL 功能描述:DEVKIT 68HC908JL3/JK3/JK1 MMDS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
KITMMDS08KX 功能描述:DEV KIT FOR 68HC908KX8/KX2 MMDS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
KITMMDS08MR32 功能描述:DEVKIT FOR 68HC908MR32/MR16 MMDS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP
KITMMEVS08AB32 功能描述:DEV KIT FOR 68HC908AB32 MMEVS RoHS:否 类别:编程器，开发系统 >> 过时/停产零件编号 系列:- 标准包装:1 系列:- 传感器类型:CMOS 成像，彩色（RGB） 传感范围:WVGA 接口:I²C 灵敏度:60 fps 电源电压:5.7 V ~ 6.3 V 嵌入式:否 已供物品:成像器板 已用 IC / 零件:KAC-00401 相关产品:4H2099-ND - SENSOR IMAGE WVGA COLOR 48-PQFP4H2094-ND - SENSOR IMAGE WVGA MONO 48-PQFP