Rainbow-electronics DS1846 Manual do Utilizador

1 of 16 090800FEATURES Three linear taper potentiometers− Two 10 kΩ, 100 position− One 100 kΩ, 256 position 256 bytes of EEPROM memory Monitor

DS184610 of 16oPUSHBUTTON RESET Figure 4PUSHBUTTON RESET CONTROLLED BY NMI Figure 5SDASCLA0WPNMIL0W1L1L2GNDVCCINPBRSTRSTRSTH0W0H1W2H2DS1846UPSTREAM

DS184611 of 16oNON-MASKABLE INTERRUPT EXAMPLE Figure 6VSENSE = R2R2 R1+ X 1.25 VMAX = TPSENSEVV X VCCExample: VSENSE = 4.70V at the trip pointVCC = 3

DS184612 of 16oABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -1.0V to +6.0VOperating Temperature -40°C to +85°C; IndustrialProgrammin

DS184613 of 16oDC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; VCC =2.7V to 5.5V)PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTESSupply CurrentActive

DS184614 of 16oAC ELECTRICAL CHARACTERISTICS (-40ºC to 85ºC, Vcc=2.7V to 5.5V)PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTESSCL clock frequency f

DS184615 of 16oNOTES:1. All voltages are referenced to ground.2. ISTBY specified with for VCC equal 3.0V and 5.0V and control port logic pins are d

DS184616 of 16o17. Icc specified with SDA pin open.18. Maximum ICC is dependent on clock rates. During serial port activity maximum ICC is specified

DS18462 of 16oThe EEPROM memory allows a user to store configuration or calibration data for a specific system ordevice as well as provide control of

DS18463 of 16oPIN DESCRIPTIONSVCC - Power Supply Terminal. The DS1846 will support supply voltages ranging from +2.7 to+5.5 volts.GND - Ground Termin

DS18464 of 16oMEMORY ORGANIZATIONThe DS1846’s serial EEPROM is internally organized with 32 pages. Each page contains 8 bytes. Eachbyte requires an

DS18465 of 16oWrite Operations: After receiving a matching device address byte with the R/W bit set low, the devicegoes into the write mode of operat

DS18466 of 16oThe sequential read operation is terminated when the master initiates a stop condition. The master doesnot respond with a zero.For a mo

DS18467 of 16oAcknowledge: Each receiving device, when addressed, is obliged to generate an acknowledge after thereception of each byte. The master d

DS18468 of 16oWRITE PROTECTAn external pin WP (write protect) protects EEPROM data and potentiometer position from alteration inan application. This

DS18469 of 16oWhen the supply being monitored decays to the voltage sense point, the DS1846 pulses the NMI outputto the active state for a minimum 2