Pocket_Watch_B_Manua.. - ISL

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Miniature Engineering Modules – Pocket Watch BAC ELECTRICAL CHARACTERISTICSAt T A = 25°C and Vcc = 5.0V unless otherwise noted.Characteristic Symbol Min Typ Max Unit NotesCommunicationbit period240048009600Offset when abit is read240048009600Time for acommand frommaster to beresponded toBaud generatorerrorBit periodtemperaturecoefficientTime accuracywhen clock isreadT BIT413206103T RD18090454162081042001005041921110522011060µS The bit period is determinedby an on-board oscillator,and is temperature sensitive.µS This is used to ensure a bitis valid when read. A bitmust be valid for at least thislong in order for thecommunication to not beerroneous.T TURN 450 500 550 µS This time is used to allow fora master to change fromtransmission mode toreception mode.B GE 2 6 %BP TEMPCO -1.8 -1.6 -1.7 nS/°C Therefore at highertemperatures, a slower baudrate may be necessary at themaster.T SAC +1 sec The PWB can be up to 1second slow if acommunication happens justprior to a time update.Time accuracy T EAC +154 +304 sec/yearAlarm turn ontime accuracySingle Shot turnoff timeaccuracyShort Astableturn off timeaccuracyShort AstablerepetitionaccuracyLong Astableturn off timeaccuracyLong AstablerepetitionaccuracyBecause the timebase isfactory calibrated, the majordetermining factor is theoperating temperature of thePWB.A TOT 1 sec Lowest resolution of clockA SSTOF 1 sec Lowest resolution of clockA SATOF 1 sec Lowest resolution of clockA SARA 1 min Short astable alarm repeatson the nearest whole minuteA LATOF 1 min Long astable alarm turns offat the nearest whole minuteA LARA 1 min Long astable alarm keepstrack of hours to nearestminute3 SOLUTIONS CUBED530-891-8045
Miniature Engineering Modules – Pocket Watch BTTURNFMSTARTTBITTRDSTOPTMSTARTSTOPT BITCommunication TimingNot Available Via PDFAlarm timing0-1Seconds/day error-2-3-4-5-6-20-10010203040506070Temperature (°C)Temperature characteristic of PWB accuracy4 SOLUTIONS CUBED530-891-8045
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Pocket_Watch_B_Manua.. - ISL

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