Analog Devices ADXL180 iMEMS, Руководство пользователя

Страница: 27 / 56

ADXL180
Rev. 0 | Page 27 of 56
Influence of MD On Data Range
Table 23. MD Settings and Device Data Ranges
Mode (Device Data) MD1 MD0 SVD
1
AZE
2
Data Range
0: ADIFX
3
(All Configuration Data, Serial Number, and
Manufacturer ID)
0 0 0 0 Full
0 0 0 1 Reduced
0 0 1 0 Configuration
error
0 0 1 1 Configuration error
1: Range Data Only
3
(Limited Range Selection)
0 1 0 0 Full
0 1 0 1 Reduced
0 1 1 0 Reduced
0 1 1 1 Reduced
2: 8-Bit Coded Device Data
3
(UD[7:0], Serial Number, and Range)
1 0 0 0 Full
1 0 0 1 Reduced
1 0 1 0 Reduced
1 0 1 1 Reduced
3: 10-Bit Coded Device Data
4
(UD[7:0], Serial Number, and Range)
1 1 0 0 Full
1 1 0 1 Reduced
1 1 1 0 Reduced
1 1 1 1 Reduced
1 SVD is the state vector disable configuration bit.
2
AZE is the auto-zero enable configuration bit
3
If Phase 2 Mode 0, Mode 1, or Mode 2 is selected, the device data is 8-bit data. If the 10-bit data mode is selected in combination with Phase 2 Mode 0, Mode 1, or Mode
2, the 8-bit device data is left justified in the 10-bit data field. The two LSBs are held at zero (see Table 24).
4
The 10-bit device data mode (Phase 2 Mode 3) is incompatible with the 8-bit data mode (the DAT bit is set to 1). The device transmits a configuration error code if
Phase 2 Mode 3 is selected and the DAT bit is set to 1. No sensor data is transmitted.
Device Data Mapping in Phase 2
Table 24. Phase 2 Device Data Bit Mapping in 10-Bit Sensor Data Mode
DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Device
Data MSB Device
Data Device
Data Device
Data Device
Data Device
Data Device
Data Device
Data LSB 0 0
Table 25. Phase 2 Device Data Bit Mapping in 8-Bit Sensor Data Mode
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Device Data MSB Device Data Device Data Device Data Device Data Device Data Device Data Device Data LSB