AK8999A Datasheet, PDF (44/68 Pages) Asahi Kasei Microsystems – Pressure Sensor Control IC

3) Flow chart of Digital block
The flow chart of digital block is shown below.
Flow chart of Digital block
POWER ON
CONFIDENTIAL
Normal Mode
VOUT
: Analog Output
No _{CSCLK=”High” Yes}
> 1.0 ms
Timing chart1
EEPROM Write
Instruction code
: 101
EEPROM Read
Instruction code
: 110
Digital I/O Mode
VOUT
: DATA I/O
Register Read
Instruction code
: 010
Register Write
Instruction code
: 001
[AK8999A/AW/AD]
Note)
In DATA I/O mode, when the condition of CSCLK=Low > 0.5 ms consists,
it becomes an Analog Output mode.
The state of EEPROM Write Enable and Control Register Access Enable
is required.
CSCLK=”High”
(Write Time)
> 5ms
Timing chart2
VREF
Adjustment set
VTMP
Adjustment set
Between
CSCLK="High"
VOUT : VREF
Between
CSCLK="High"
VOUT : VTMP
IREF
Adjustment set
Pressure Threshold
Detector 1/2
Threshold
Adjustment set
Pressure Threshold
Detector 1/2
Hysteresis Level
Adjustment set
Level shift
Adjustment set
Between
CSCLK="High"
VOUT : IREF
Between
CSCLK="High"
VOUT
: Pressure Level
Between
CSCLK="High"
VOUT : Pressure
Hysteresis Level
Between
CSCLK="High"
VOUT : Level shift
Timing chart3
OSC
Adjustment set
Between
CSCLK="High"
OSC clock counting
MS1600-E-00
CSCLK=”Low”
No
> 0.5 ms
Yes
- 44 -
2014/05