参数资料
型号: MMA6556KW
厂商: Freescale Semiconductor
文件页数: 45/53页
文件大小: 0K
描述: IC ACCELEROMETER X AXIS 16QFN
标准包装: 75
轴: X
加速范围: ±120g
灵敏度: 16 LSB/g
电源电压: 3.13 V ~ 5.25 V
输出类型: SPI
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-EP(6x6)
4.2
SPI Response Format
Table 27. SPI Response Message Summary
MSB
LSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Response to Valid Acceleration Request
CMD
A
AX
Reference
D15
D14
AX
P
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D1
D0
Acceleration Data
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
AX = Axis Requested
0
1
Acceleration Data Response
N/A
P = Odd Parity
S[1:0] = Device Status
0
0
1
1
0
1
0
1
In Initialization (ENDINIT = ‘0’)
Normal Data Request
ST Active
Internal Error Present / SPI Error
CMD
A
AX
D1
D0
AX
P
S1
S0
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
Reference
1
1
0
0
Accel Data
Accel Data
0
0
P
P
0
1
1
0
Acceleration Data
Self Test Active Acceleration Data
Valid Accel
1
0
Accel Data
0
P
0
0
Acceleration Data, Initialization in Process (ENDINIT=’0’)
Data Request
Section 4.3
1
1
1
1
1
1
Accel Data
Accel Data
Accel Data
1
1
1
P
P
P
0
1
0
1
0
0
Invalid Accel Request
Invalid Accel Request
Invalid Accel Request
MSB
LSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Response to Valid Register Access
CMD
A
AX
Reference
D15
D14
AX
P
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
Register Write
0
1
0
0
1
P
1
1
1
0
Section 4.4.1
New Contents of Register
D7
D6
D5
D4
D3
D2
D1
D0
Register Read
0
0
0
1
0
P
1
1
1
0
Section 4.4.2
Contents of Register
MSB
LSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Error Responses
CMD
A
AX
Reference
D15
D14
AX
P
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Invalid Accel
Request
x
x
Section 4.3
0
0
AX
P
1
1
0
0
0
0
0
0
0
0
0
0
Internal Error
Present
MISO Error
x
x
x
x
Section 4.5.5
Section 4.5.2
0
0
0
P
1
1
0
0
0
0
0
0
0
0
0
0
SPI Error
x
x
Section 4.5.1
Invalid
Register
0
x
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
Section 4.4
Request
Self Test Error
0
x
0
0
AX
P
1
1
0
0
0
0
0
0
0
0
0
0
Section 4.5.5
MMA655x
Sensor
Freescale Semiconductor, Inc.
45
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