AK9720 Datasheet, PDF (6/31 Pages) Asahi Kasei Microsystems – IR Sensor Module with I2C I/F

[AK9720]
Digital/Analog Output Select Function
Digital/Analog output select is controlled by CAD1 pin and CAD0 pin.
When CAD1 and CAD0 are set up to CAD1=CAD0=1, the output of SOUT and TOUT are
compulsorily set to “ON”, regardless of a setup of a register. SOUT outputs the temperature
compensated Analog signal.
When CAD1 and CAD0 are set up so that they are not set up to CAD1=CAD0=1, digital
signal can be used through I2C interface. When CAD1 and CAD0 are set up to
CAD1=CAD0=1, although I2C interface can be accessed at a slave address 67H, the
control by a register does not perform.
When CAD1 is set up to CAD1=1, Analog Signal Mode is selected, and ON/OFF of output
is selected by CAD0. SCL pin and SDA pin should be fixed to High level. (Don’t access to
I2C interface in Analog Output Mode.)
If CAD1 and CAD0 are set up to CAD1=CAD0=1 at the time of power supply starting
without using an I2C interface, and ON/OFF of Analog Output is changed by CAD0 after
power supply starting, then Analog Output OFF is selected, AK9720 becomes Power Down
Mode, because “MODE[2:0] =000” is an initial value.
CAD1
0
0
1
1
CAD0
0
1
0
1
Digital Output
Enable
Enable
Enable
Disabled
Slave Address
64H
65H
66H
(67H)
Analog Output
(OFF)
(OFF)
OFF
ON
Rev.02
AKM Confidential
-6-
2012/11