AK9752 Datasheet, PDF (10/36 Pages) Asahi Kasei Microsystems – Ultra-small IR sensor IC with IC

[AK9752]
10. Functional Descriptions
10.1. Power Supply States
When VDD1 and VDD2 turn on from the state of VDD1= VDD2= OFF(0V), Power-on Reset(POR)
automatically operates, all registers will be initialized, and the AK9752 will be set to Stand-by Mode.
State
Table 10.1. Power Supply States and Functions
VDD pin
I²C
INTN pin Analog Circuit
1
OFF(0V)
Disable Unfixed Power Down
Power Down
2
1.65V - 1.95V Enable “H” (* 13) except POR
circuit
Note:
* 13. “H” level by a pull-up resistor.
IDD
Not specified
< 10µA
10.2. Reset functions
AK9752 is initialized in the following conditions,
(1) Power-on Reset(POR)
When VDD1, VDD2 turns ON, Power-on Reset (POR) resets AK9752 until VDD reaches
the operating voltage.
After POR, all registers are set to initial values, and Stand-by Mode is selected.
Accessing registers should be performed after POR.
(2) Software Reset
AK9752 is reset by writing software reset register.
An acknowledge signal will return, and AK9752 becomes the same state as after POR.
10.3. Operating Mode
AK9752 is assumed to operate with connecting to Host MCU.
AK9752
INTN
SCL
SDA
I²C interface
Host
MCU
Figure 10.1 Example of use (Connection diagram)
AK9752 and Host MCU should be connected with SCL and SDA (I²C interface). The operating control
and the data readout of AK9752 can be available through the I2C interface. The slave address is 64H.
INTN output can be used as interrupt control signal.
Refer to Recommended External Circuits (Figure 17.1) for details.
There are three operating modes.
(1) Stand-by Mode
(2) Continuous Mode
(3) Single shot Mode
016016473-E-00
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2017/1