AK09916C Datasheet, PDF (8/29 Pages) Asahi Kasei Microsystems – 3-axis Electronic Compass

[AK09916]
9. Function Descriptions
9.1. Power States
When VDD is turned on from Vdd = OFF (0V), all registers in AK09916 are initialized by POR circuit and
AK09916 transits to Power-down mode.
State
1
2
VDD
OFF (0V)
1.65V to 1.95V
Table 9.1. Power state
Power state
OFF
It doesn’t affect external interface.
ON
9.2. Reset Functions
Power on Reset (POR) works until Vdd reaches to the operation effective voltage (about 1.1V: reference
value for design) on power-on sequence. After POR is completed, all registers are initialized and AK09916
transits to Power-down mode.
When Vdd = 1.65 to 1.95V, POR circuit is active.
AK09916 has two types of reset;
(1) Power on Reset (POR)
When Vdd rise is detected, POR circuit operates, and AK09916 is reset.
(2) Soft reset
AK09916 is reset by setting SRST bit. When AK09916 is reset, all registers are initialized and
AK09916 transits to Power-down mode.
015007392-E-02
-8-
2015/12