Rainbow-electronics DS2482-800 Manual de usuario

1 of 22 REV: 061804 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple rev

DS2482-800: Eight-Channel 1-Wire Master 10 of 22 Set Read Pointer Command Code E1h Command Parameter Pointer Code Description Sets the read pointer

DS2482-800: Eight-Channel 1-Wire Master 11 of 22 Channel Select Command Code C3h Command Parameter Selection Code Description Sets the 1-Wire IO ch

DS2482-800: Eight-Channel 1-Wire Master 12 of 22 1-Wire Reset Command Code B4h Command Parameter None Description Generates a 1-Wire Reset/Presence

DS2482-800: Eight-Channel 1-Wire Master 13 of 22 Figure 6. Write-0 Time Slot Pullup (see Fig. 2) DS2482 Pulldown tREC0VccVIH1VIL10VtF1tSLOTtW0

DS2482-800: Eight-Channel 1-Wire Master 14 of 22 1-Wire Read Byte Command Code 96h Command Parameter None Description Generates eight read data tim

DS2482-800: Eight-Channel 1-Wire Master 15 of 22 Bit Allocation in the Direction Byte bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 V x x

DS2482-800: Eight-Channel 1-Wire Master 16 of 22 Figure 9. DS2482 Slave Address A6 A5 A4 A3 A2 A1 A00110AD2AD1AD0 R/W7-Bit Slave AddressMost Signi

DS2482-800: Eight-Channel 1-Wire Master 17 of 22 Not Acknowledged by Master: At some time when receiving data, the master must signal an end of dat

DS2482-800: Eight-Channel 1-Wire Master 18 of 22 Data Direction Codes Master-to-Slave Slave-to-Master I²C Communication Examples Device Reset,

DS2482-800: Eight-Channel 1-Wire Master 19 of 22 1-Wire Reset, e.g., to begin or end 1-Wire communication Case A: 1-Wire idle (1WB = 0), no busy po

DS2482-800: Eight-Channel 1-Wire Master 2 of 22 ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground -0.5V, +6VMaximum Current Int

DS2482-800: Eight-Channel 1-Wire Master 20 of 22 Case C: 1-Wire idle (1WB = 0), busy polling until the 1-Wire Command is completed. S AD,0 A 1WR

DS2482-800: Eight-Channel 1-Wire Master 21 of 22 Case C: 1-Wire busy (1WB = 1) S AD,0 A 1WT A\ P The master should stop and restart as soon as

DS2482-800: Eight-Channel 1-Wire Master 22 of 22 capacitance of 400pF the maximum pullup resistor values are 2.95kW at standard speed and 885W at f

DS2482-800: Eight-Channel 1-Wire Master 3 of 22 PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Standard 60 64 68 Write 0 Low Time tW0L Overdrive 7.

DS2482-800: Eight-Channel 1-Wire Master 4 of 22 PIN DESCRIPTION Note 1: Operating current with 1-Wire write byte sequence followed by continuous R

DS2482-800: Eight-Channel 1-Wire Master 5 of 22 Figure 1. Block Diagram I²CInterfaceControllerSDASCLConfigRegisterI/OControllerStatusRegisterLineX

DS2482-800: Eight-Channel 1-Wire Master 6 of 22 Channel Selection Register The content of the Channel Selection Register specifies which of the cha

DS2482-800: Eight-Channel 1-Wire Master 7 of 22 Presence Pulse Masking (PPM) The PPM bit controls whether the DS2482 will mask the leading edge (fa

DS2482-800: Eight-Channel 1-Wire Master 8 of 22 Figure 4. Low-Impedance Pullup Timing Vcc0VWrite 1Write 0Edges withactive pull-upPull-up DS2482 Pu

DS2482-800: Eight-Channel 1-Wire Master 9 of 22 Logic Level (LL) The LL bit reports the logic state of the active 1-Wire line without initiating an