DS1904L-F5 Maxim Integrated Products, DS1904L-F5 Datasheet
DS1904L-F5
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DS1904L-F5 Summary of contents
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... Class I, Division 1, Group and D Locations (application pending) F5 MicroCanÔ 5.89 0.36 0.51 YYWW REGISTERED RR 40 000000FBC52B DATA GROUND All dimensions are shown in millimeters ORDERING INFORMATION DS1904L-F5 F5 MicroCan EXAMPLES OF ACCESSORIES DS9096P Self-Stick Adhesive Pad DS9101 Multi-Purpose Clip DS9093RA Mounting Lock Ring DS9093A Snap-In Fob DS9092 iButton Probe ...
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Accessories permit the DS1904 to be mounted on almost any surface including printed circuit boards and plastic key fobs. The DS1904 adds functions such as calendar, time and date stamp, stopwatch, hour meter, ...
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HIERARCHICAL STRUCTURE FOR 1-WIRE PROTOCOL Figure 2 Bus Master Command Level 1-Wire ROM Commands (see Figure DS1904 Function (see Figure 64-BIT LASERED ROM Figure 3 MSB 8-Bit CRC Code MSB LSB 1-WIRE CRC GENERATOR Figure 4 1ST 2ND 3RD STAGE ...
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TIMEKEEPING A 32.768 kHz crystal oscillator is used as the time base for the real-time clock counter. The oscillator can be turned on or off under software control. The oscillator must be on for the real time clock to function. ...
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CLOCK FUNCTION COMMAND FLOW CHART Figure 5 Master TX Control Function Command 66H Read Clock ? Y DS1904 copies RTC Counter to R/W Buffer Bus Master RX Device Control Byte Bus Master RX LS Byte (7:0) Bus Master RX next ...
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READ CLOCK [66h] The read clock command is used to read the device control byte and the contents of the real-time clock counter. After having received the most significant bit of the command code the device copies the actual contents ...
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The idle state for the 1-Wire bus is high. If for any reason a transaction needs to be suspended, the bus MUST be left in the idle state if the transaction is to resume. If this does not occur and ...
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ROM FUNCTIONS FLOW CHART Figure 7 33H N Read ROM Command ? Y DS1904 TX Family Code 1 Byte DS1904 TX Serial Number 6 Bytes DS1904 TX CRC Byte Master TX Reset Pulse DS1904 TX Presence Pulse Master TX ROM ...
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Skip ROM [CCh] This command can save time in a single drop bus system by allowing the bus master to access the clock functions without providing the 64-bit ROM code. If more than one slave is present on the bus ...
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READ/WRITE TIMING DIAGRAM Figure 9 Write-one Time Slot V PULLUP V PULLUP MIN V IH MIN V IL MAX 0V RESISTO MASTER Write-zero Time Slot V PULLUP V PULLUP MIN V IH MIN V IL MAX 0V RESISTOR MASTER Read-data ...
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PHYSICAL SPECIFICATION Size Weight Humidity Altitude Expected Service Life Safety ABSOLUTE MAXIMUM RATINGS* Voltage on 1-Wire to Ground Operating Temperature Storage Temperature * This is a stress rating only and functional operation of the device at these or any other ...
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NOTES: 1. All voltages are referenced to ground external pull-up voltage. PUP 3. Input load is to ground. 4. Read data setup time refers to the time the host must pull the 1-Wire bus low to read ...