FXOS8700CQ datasheet(70/86 Pages) FREESCALE

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Figure 113. Illustration of magnetic threshold detection

9.16.2

M_THS_SRC (0x53) register

Magnetic threshold interrupt source register.

This register keeps track of the magnetic threshold event which is triggering (or has triggered, when M_THS_CFG[m_ths_ele]

= 1) the event flag. In particular, if M_THS_SRC[m_ths_ea] is set to a logic ‘1’ then the logical combination of magnetic event

flags specified in M_THS_CFG is true.

m_ths_ea

—

m_ths_zhe

m_ths_zhp

m_ths_yhe

m_ths_yhp

m_ths_xhe

m_ths_xhp

00000

Figure 114. M_THS_SRC register

Table 89. M_THS_SRC bit descriptions

Field

Description

m_ths_ea

Event active flag.

0: No event flag has been asserted

1: One or more event flag(s) has been asserted.

m_ths_zhe

Z-high event flag.

0: No event detected

1: Z-high event has been detected

This bit always reads zero if the m_ths_zefe control bit is set to zero

m_ths_zhp

Z-high event polarity flag.

0: Z event detected was positive polarity

1: Z event detected was negative polarity

This bit always reads zero if the m_ths_zefe control bit is set to zero

m_ths_yhe

Y-high event flag.

0: No event detected

1: Y-high event has been detected

This bit always reads zero if the m_ths_yefe control bit is set to zero

m_ths_yhp

Y-high event polarity flag.

0: Y event detected was positive polarity

1: Y event detected was negative polarity

This bit always reads zero if the m_ths_yefe control bit is set to zero

m_ths_xhe

X-high event flag.

0: No event detected

1: X-high event has been detected

This bit always reads zero if the m_ths_xefe control bit is set to zero

0 Field

-Full Scale

+ Full Scale

Threshold +

Threshold -

X (Y, Z) High

Larger Field

Smaller Field

X, Y, Z above threshold (positive)

X, Y, Z below threshold (negative)

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