DS2415P Maxim Integrated Products, DS2415P Datasheet
DS2415P
Specifications of DS2415P
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DS2415P Summary of contents
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... PIN DESCRIPTION Pin 1 Pin 2 voltage range of Pin 3 Pin 4 Pin 5 Pin 6 ORDERING INFORMATION DS2415P DS2415P/T&R DS2415X DS2415 1-Wire Time Chip 6-Pin TSOC PACKAGE TOP VIEW - GND - 1-Wire - BAT - 6-pin TSOC package Tape & Reel of DS2415P Chip Scale Pkg., Tape & Reel 112701 ...
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ROM function protocol has been established. This protocol is described in the ROM functions flow chart (Figure 7). The master must first provide one of four ROM function commands: 1) Read ROM, 2) Match ROM, 3) Search ...
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The functions required to exercise the control functions of the DS2415 are not accessible until the ROM function protocol has been satisfied. This protocol is described in the ROM functions flow chart (Figure 7). The 1-Wire bus master must first ...
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TIMEKEEPING A 32.768kHz 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. The real-time ...
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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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CLOCK FUNCTION COMMAND FLOW CHART Figure ...
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HARDWARE CONFIGURATION Figure 6 1-WIRE BUS SYSTEM The 1-Wire bus is a system that has a single bus master and one or more slaves. In all instances the DS2415 behaves as a slave. The discussion of this bus system is ...
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INITIALIZATION All transactions on the 1-ire bus begin with an initialization sequence. The initialization sequence consists of a Reset Pulse transmitted by the bus master followed by Presence Pulse(s) transmitted by the slave(s). The Presence Pulse lets the bus master ...
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ROM FUNCTIONS FLOW CHART Figure ...
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SIGNALING The DS2415 requires strict protocols to insure data integrity. The protocol consists of four types of signaling on one line: Reset Sequence with Reset Pulse and Presence Pulse, Write 0, Write 1, and Read Data. The bus master ...
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READ/WRITE TIMING DIAGRAM Figure 9 Write-1 Time Slot Write-0 Time Slot 60ms £ t < 120ms SLOT 1ms £ t < 15ms LOW1 1ms £ t < ¥ REC 60ms £ t < t < 120ms LOW0 SLOT 1ms £ ...
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Read-data Time Slot RESISTOR MASTER DS2415 CRYSTAL PLACEMENT ON PCB Figure 10 LOCAL GROUND PLANE BENEATH SIGNAL PLANE OR ON OTHER SIDE OF PCB 60ms £ t < 120ms SLOT 1ms £ t < 15ms LOWR 0 £ t < ...
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ABSOLUTE MAXIMUM RATINGS* Voltage on 1-Wire to Ground Operating Temperature Range Storage Temperature Range Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the ...
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AC ELECTRICAL CHARACTERISTICS PARAMETER Time Slot Write 1 Low Time Write 0 Low Time Read Low Time Read Data Valid Release Time Read Data Setup Recovery Time Reset Time High Reset Time Low Presence Detect High Presence Detect Low NOTES: ...