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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AS7331 датащи(PDF) 29 Page - ams-OSRAM AG |
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AS7331 датащи(HTML) 29 Page - ams-OSRAM AG |
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29 / 72 page  Document Feedback AS7331 Functional Description Datasheet • PUBLIC DS001047 • v4-00 • 2023-Mar-24 71 │ 28 It is also possible to use the 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 the distance between falling edges at pin SYN is more than the conversion time, pause time, and startup time altogether. Figure 23 shows the principle sequence of measurement in SYNS mode being ready (bits OSR:PD = “1” and OSR:SS = “1”) and waiting for the falling edge at pin SYN to startup. Figure 23: Principle Sequence of Measurement in SYNS Mode By additionally activating s tandby (bit CREG3:SB = “1”), a maximum amount of energy can be saved, because the operational readiness is not given until shortly before A/D conversion starts. When starting reading process of the results (pause time), the device is also saving energy in the standby state (see Figure 24). Figure 24 shows the principle sequence of measurement in SYNS mode being ready with OSR:PD = “1” (as in Figure 23), but with bit CREG3:SB = “1” to save a maximum amount of energy as explained above. Figure 24: Principle Sequence of Measurement in SYNS Mode Being Ready 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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