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AS73211 데이터시트(PDF) 27 Page - OSRAM GmbH

부품명 AS73211
상세설명  XYZ True Color Sensor with I²C Interface
PDF  66 Pages
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제조업체  OSRAM [OSRAM GmbH]
홈페이지  http://www.osram.com
Logo OSRAM - OSRAM GmbH

AS73211 데이터시트(HTML) 27 Page - OSRAM GmbH

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AS73211
Functional Description
Datasheet
• PUBLIC
DS000556
• v3-01 • 2018-Feb-07
65
│ 26
It is also possible to use Power Down state in combination with SYNS mode. The falling edge at pin
SYN immediately starts the conversion after Power Down ends shown by the signal at pin READY.
That kind of measurement is only useful in case of the distance between falling edges at pin SYN is
more than the conversion time, pause time and startup time together. Figure 25 shows the principle
sequence of measurement in SYNS mode being ready (bits OSR:PD = ‚1‘ and OSR:SS = ‚1‘) and
waiting for falling edge at pin SYN to startup.
Figure 25:
Principle Sequence of Measurement in SYNS Mode
By additionally activated Standby (bit CREG3:SB = ‚1‘) a maximum of energy can be saved, because
the operational readiness is given not until short before A/D conversion starts and with the beginning
read process of the results (pause time) the device is already again saving energy in Standby state
(see Figure 26). Figure 26 shows the principle sequence of measurement in SYNS mode being ready
with OSR:PD = ‚1‘ (as in Figure 25), but now with bit CREG3:SB = ‚1‘ to save a maximum of energy as
explained above.
Figure 26:
Principle Sequence of Measurement in SYNS Mode Being R
eady with OSR:PD = ‚1‘
MEASUREMENT
PAUSE
POWDOWN
POWDOWN
MEASUREMENT 1
STATE
MRES1 …
MRES3
READY
I²C activity
data
fetch
RESULTS 1
OSR
C0h
SYN
TCONV
start
start
TBREAK
TSTARTPD
TSTARTPD
SBY
S
MEASUREMENT 1
S
POWDOWN
STATE
MRES1 …
MRES3
READY
I²C activity
OSR
C0h
SYN
start
MEASUREMENT
PAUSE
POWDOWN
data
fetch
RESULTS 1
start
TBREAK
TCONV
TSTARTPD
TSTARTSB
TSTARTPD
TSTARTSB
STANDBY
STANDBY



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