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AS7331 数据表(PDF) 28 Page - ams-OSRAM AG

部件名 AS7331
功能描述  Spectral UVA/B/C Sensor
PDF  72 Pages
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制造商  AMSOSRAM [ams-OSRAM AG]
网页  https://ams-osram.com/
标志 AMSOSRAM - ams-OSRAM AG

AS7331 数据表(HTML) 28 Page - ams-OSRAM AG

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AS7331
Functional Description
Datasheet
• PUBLIC
DS001047
• v4-00 • 2023-Mar-24
71
│ 27
Figure 21:
Principle Sequence of CONT Mode
– if CREG3:SB is Set to “1”
Another example shows, that after the end of a conversion in CMD mode the AS7331 returns to power
down and/or standby state depending on the bits OSR:PD and CREG
3:SB. In case of both bits are “0”
while the measurement state the device would return to idle, waiting for the next measurement to start.
Figure 22 shows the principle sequence whereas measurement starts in CMD mode with power down
and standby switched on (device is already in measurement state):
a)
CREG3 programming: B
it CREG3:SB = “1” was set in Configuration state (not shown),
b)
OSR programming: C0h, “startup” and “wake-up” before conversion starts,
c)
“Automatically” OSR programming: 43h, the end of conversion resets bit OSR:SS, to
power down.
Figure 22:
Principle Sequence Whereas Measurement is Started in CMD Mode with Power Down, Standby
Switched On
STANDBY
MRES1 …
MRES3
READY
STATE
I²C activity
MEASUREMENT 1
data
fetch
RESULTS 1
RESULTS 2
data
fetch
TBREAK
MEASUREMENT 2
MEASUREMENT 3
TCONV
TCONV
OSR
83h
TSTARTSB
TSTARTSB
STANDBY
PAUSE
STANDBY
PAUSE
RESULTS
POWDOWN
POWDOWN
SB
MEASUREMENT
TCONV
MRES1 …
MRES3
READY
STATE
I²C activity
start (OSR:SS ← ’1')
b)
TSTARTPD
TSTARTSB
data
fetch
clear (OSR:SS ← ’0')
c)
STANDBY



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