AK9752AE Datasheet, PDF (13/36 Pages) Asahi Kasei Microsystems – Ultra-small IR sensor IC with IC

[AK9752]
10.5.2. Read-out Data during a measurement Period
The read-out registers retain the previous data during a measurement period, so the data can be read
out during the measurement period. When data is read out during the measurement period, the previous
data is read out.
Measurement
(N) th
Meas.
PD (Power down)
(N+1) th
Meas.
PD
(N+2) th
Meas.
PD
Internal Buffer (N-1)th data (N)th data
(N+1)th data
(N+2)th data
Read-out Register (N-1)th data (N)th data
DRDY(ST1)
DOR(ST2)
(N+1)th data
Read-out Register is protected
during read-out.
DRDY changes to "1" and Read-out Register
is updated at read-out completion.
INTN output
SDA output
ST1 INTC (N)th data ST2
ST1 INTC (N)th data ST2
ST1 INTC (N+1)th data ST2
* INTC = INTCAUSE
Figure 10.5. Read-out during a measurement period
10.5.3. Skipping Data
When (N)th data is not read out between the end points of (N+1)th measurement, DRDY is held until
measurement data is read out. Because the Nth data was skipped, DOR changes to “1” at the
completion of (N+1)th measurement.
Measurement
(N) th
Meas.
PD (Power down)
Internal Buffer (N-1)th data (N)th data
Read-out Register (N-1)th data (N)th data
DRDY(ST1)
DOR(ST2)
INTN output
SDA output
(N+1) th
Meas.
PD
(N+1)th data
(N+1)th data
(N+2) th
Meas.
PD
(N+2)th data
(N+2)th data
ST1 INTC (N+1)th data ST2
* INTC = INTCAUSE
Figure 10.6. Data Skipping
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