Freescale Semiconductor FRDM-FXS-MULTI 데이터 시트

다운로드
페이지 48
6.11 0x0F: RT_SRC
This register indicates the source of the Rate Threshold event. It also clears the
RT_SRC flag in the 
Table 36. RT_ SRC Register
Bit
7
6
5
4
3
2
1
0
Read
0
EA
ZRT
Z_RT_Pol
YRT
Y_RT_Pol
XRT
X_RT_Pol
Write
Reset
0
0
0
0
0
0
0
0
Table 37. RT_SRC field descriptions
Field
Description
6
EA
Event active flag
• Asserted whenever a rate threshold event has been detected on one or more of the enabled axes.
• The contents should only be modified when the device is in Standby mode
• The internal state of the Rate Threshold function is reset when a transition from Standby to Active
or Ready to Active modes occurs.
• It is upon reading this register when 
RT_CFG[ELE] = 1, or self-cleared by the function when the
condition is no longer true with RT_CFG[ELE] = 0.
0: No event flags have been asserted
1: One or more event flags have been asserted
5
ZRT
Z rate event
• Indicates that a rate threshold event (as defined in 
Z axis
• Cleared when read if it has been latched (ELE = 1).
0: Z rate lower than RT_THS value
1: Z rate greater than RT_THS event has occurred
4
Z_RT_Pol
Polarity of Z event
• Indicates the rate polarity for the event detected on the Z axis
0: Z rate event was Positive
1: Z rate event was Negative
3
YRT
Y rate event
• Indicates that a rate threshold event (as defined in 
Y axis
• Cleared when read if it has been latched (ELE = 1).
0: Y rate lower than RT_THS value
1: Y rate greater than RT_THS value event has occurred
Table continues on the next page...
Register Descriptions
Xtrinsic 3-Axis Digital Angular Rate Gyroscope, Rev1.2, 7/2014.
35
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