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参数资料
| 型号： | MMA5224WR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 51/58页 |
| 文件大小： | 0K |
| 描述： | IC ACCELER 240G X-AXIS 16QFN |
| 标准包装： | 1,000 |
| 轴： | X |
| 加速范围： | ±240g |
| 灵敏度： | 8LSB/g，4LSB/g，2LSB/g，1LSB/g |
| 电源电压： | 4.2 V ~ 17 V |
| 输出类型： | 数字 |
| 带宽： | 400Hz |
| 接口： | SPI |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-QFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN（6x6） |
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5.3.2.1
Short Frame Command and Response Format
Short frames are the simplest type of command message. No data is transmitted in a short frame command. Only specific
instructions are performed in response to short frame commands. The Short Frame format is shown in Figure 43 . Short Frame
commands and responses are defined in Section 5.3.6 , Table 18 .
Start Bits
Sensor
Address
Function Code
CRC
Response
S2
S1
S0
Sy
SA0 SA1 SA2 Sy
FC0 FC1 FC2 Sy
C2
C1
C0
RC
RD1
0
1
0
1
1
0
0
1
0
0
1
1
0
0
0
$1E2
$3FF
Figure 43. Programming Mode Via PSI5 Short Command and Response Format
5.3.2.2
Long Frame Command and Response Format
Long frames allow for the transmission of data nibbles for register writes. The device can provide register data in response to
a read or write request. The Long Frame format is shown in Figure 44 . Long Frame commands and responses are defined in
Section 5.3.6 .
Start Bits
Sensor
Address
Function Code
Register Address
Data
CRC
Response
S2 S1 S0 Sy SA0 SA1 SA2 Sy FC0 FC1 FC2 Sy RA0 RA1 RA2 Sy RA3 RA4 RA5 Sy D0 D1 D2 Sy D3 C2 C1 Sy C0
RC
RD1
RD0
0
1
0
1
1
0
0
1
0
1
0
1
0
0
0
1
0
0
0
1
1
1
1
1
1
0
0
1
0
$1E2
$3FF
$3FF
Figure 44. Programming Mode Via PSI5 Long Command and Response Format
5.3.3
Command Message CRC
Programming mode command error checking is accomplished by a 3-bit CRC. The 3-bit CRC is calculated using all message
bits except start bits and sync bits. The CRC verification uses a generator polynomial of g(x) = X 3 +X+1, with a seed value = ‘111’.
The data is provided to the CRC calculator in the order received (LSB first, SAdr, FC, RAdr, Data), and then augmented with three
‘0’s. Table 8 shows some example CRC calculation values for 10-bit data transmissions.
The calculated CRC is then compared against the received 3-bit CRC (received MSB first). If a CRC mismatch is detected,
the device responds with a CRC Error response as defined in Section 5.3.7 .
5.3.4
Command Sync Pulse Blanking Time
In Programming Mode and Programming Mode Entry, the device employs a fixed Sync Pulse blanking time of t SYNC_OFF_500
regardless of the state of the BLANKTIME bit.
5.3.5
Command Timeout
In the event that the device does not detect a sync pulse within a 4-bit window time (missing sync bit), the command reception
will be terminated and the device will respond to the next sync pulse with a Short Frame Framing Error response as defined in
Section 5.3.7 .
MMA52xxKW
Sensors
Freescale Semiconductor, Inc.
51
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MMA5248AKW | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Xtrinsic MMA52xxAKW PSI5 Inertial Sensor |
| MMA5248AKWR2 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Xtrinsic MMA52xxAKW PSI5 Inertial Sensor |
| MMA5248KW | 功能描述:加速计 - 板上安装 X-LATERAL 480G 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 |
| MMA5248KWR2 | 功能描述:加速计 - 板上安装 X-LATERAL RANGE 480G 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 |
| MMA5248W | 功能描述:加速计 - 板上安装 X-LATERAL 480G 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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