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MMA685X 데이터시트(PDF) 43 Page - Freescale Semiconductor, Inc

부품명 MMA685X
상세설명  Single-Axis SPI Inertial Sensor
PDF  52 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MMA685X 데이터시트(HTML) 43 Page - Freescale Semiconductor, Inc

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Sensors
Freescale Semiconductor, Inc.
43
MMA685x
4.1
SPI Command Format
Commands are transferred from the SPI master to MMA685x. Valid commands fall into two categories: register operations,
and acceleration data requests.
Table 26. SPI Command Message Summary
MSB
LSB
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
AX
A
OC
0
0
0
0
0
0
0
0
0
SD
ARM
P
Command Type
Reference
AX= Axis Selection
0
Acceleration Data
1N/A
A = Acceleration Data Request
0
Register Operation
1
Acceleration Data Request
OC = Offset Cancelled Data Request
0
Offset Cancelled Data Request
1
Raw Acceleration Data Request
SD = Signed Data Confirmation
Signed Data Enabled
0
Unsigned Data Enabled
1
ARM = ARM Function Status Confirmation
Disabled / PCM Output Enabled
0
Arming Function Enabled
1
P = Odd Parity
0
AX
A
OC
0
0
0
0
0
0
0
0
0
SD
ARM
P
Accel Data
0010000
000000000
OC, Signed Data, Disabled/PCM
0010000
000000011
OC, Signed Data, ARM Enabled
0010000
000000101
OC, Unsigned Data, Disabled/PCM
0010000
000000110
OC, Unsigned Data, ARM Enabled
0011000
000000001
Raw, Signed Data, Disabled/PCM
0011000
000000010
Raw, Signed Data, ARM Enabled
0011000
000000100
Raw, Unsigned Data, Disabled/PCM
0011000
000000111
Raw, Unsigned Data, ARM Enabled
0110000
000000001
Invalid Command
0110000
000000010
Invalid Command
0110000
000000100
Invalid Command
0110000
000000111
Invalid Command
0111000
000000000
Invalid Command
0111000
000000011
Invalid Command
0111000
000000101
Invalid Command
0111000
000000110
Invalid Command
P
AX
A
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Command Type
Reference
P0
0
A4
A3
A2
A1
A0
0
0
0
0
0
0
0
0
Register Read
Section 4.4
Register Address
P1
0
A4
A3
A2
A1
A0
D7
D6
D5
D4
D3
D2
D1
D0
Register Write
Section 4.4
Register Address
Data to be Written to Register
P = Odd Parity



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