AK9753 Datasheet, PDF (18/50 Pages) Asahi Kasei Microsystems – IR Sensor IC with I2C I/F

[AK9753]
11.4.5. Continuous Mode 0 (EMODE [2:0] = “100”)
When Continuous Mode 0 (EMODE [2:0] = “100”) is selected the measurement is automatically repeated
at the cycle which is determined by the digital filter cut-off frequency (EFC [2:0], Table 16.2).
When a measurement have been done, the measurement data is stored to the measurement register
(IR1L to TMPH), and new measurement is started. * Please refer to Table16.1 for first measurement
time.
This Mode is terminated by setting the AK9753 to Stand-by Mode (EMODE [2:0] = “000”).
When EMODE [2:0] is re-written during a measurement, the measurement is interrupted. Then the last
data is retained to the register.
When Continuous Mode 0 is selected, a register write command should be executed. If register write
command should be executed during a measurement, a right measurement data cannot be gotten.
Change the register
EMODE[2:0]
000
100
Change the register
000
Analog circuit
Power down
Digital calculation
Wait
4.5ms
Power on
Measurement _{Measurement Measurement Measurement} Measurement
Power down
Wait
Ready
(Depended on EFC [2:0])
When a command enters
measurement is interrupted.
Last data is retained to the register.
Figure 11.4. Continuous Mode 0
11.4.6. Continuous Mode 1,2,3 (EMODE [2:0] = “101”, “110”, “111”)
When Continuous Mode 1, 2, and 3 (EMODE [2:0] = “101”, “110”, “111”) are selected, a measurement
and a wait are automatically repeated at the cycle according to the selected measurement Mode
(EMODE [2:0]) and the digital filter cut-off frequency (EFC [2:0]).
A wait time length depends on the measurement Mode. When a measurement has been done, the
measurement data is stored to the measurement register (IR1L to TMPH).
This Mode is terminated by setting the AK9753 to Stand-by Mode (EMODE [2:0] = “000”).
When EMODE [2:0] is re-written during a measurement, the measurement is interrupted. Then the last
data is retained to the register.
When Continuous Mode 1, 2, and 3 is selected, a register write command should be executed. If a
register write command should be executed during a measurement, a right measurement data cannot be
gotten. * Please refer to Table16.1 for first measurement time.
EMODE [2:0]
000
Change the register
Analog circuit
Power down
Power on
101 or 110 or 111
Change the register
000
Power down
Power on
Power down Power on
Power down
4.5ms
4.5ms
4.5ms
Digital Calculation
Wait
Measurement
Wait
Measurement
Ready
Ready
Wait
Measurement
Wait
Measurement is interrupted.
Register retains the last data.
Ready
Figure 11.5. Continuous Mode 1, 2, and 3
017005237-E-00
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2017/04