Rainbow-electronics DS1855 Manuale Utente

1 of 20 100101FEATURES§ Two linear taper potentiometers- DS1855-010 (one 10k, 100 position andone 10k, 256 position)- DS1855-020 (one 10k, 100 posi

DS185510 of 20LOCKING AND UNLOCKING EEPROMIn addition to the WP pin, it is possible to write-protect, or lock, certain portions of the EEPROM throughs

DS185511 of 202-WIRE PROTOCOL DATA TRANSFER PROTOCOL Figure 22-WIRE AC CHARACTERISTICS Figure 3

DS185512 of 20ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +6.0VOperating Temperature Range -40°C to +85°C; Extended Indust

DS185513 of 20ANALOG RESISTOR CHARACTERISTICS (-40°C to +85°C; VCC = 2.7V to 5.5V)PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTESResistor Inputs L

DS185514 of 20AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C, VCC = 2.7V to 5.5V)PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTESSCL Clock Frequency

DS185515 of 20NOTES:1. All voltages are referenced to ground.2. ISTBY specified with for VCC = 3.0V and 5.0V, and control port logic pins are driven

DS185516 of 20TYPICAL OPERATING CHARACTERISTICS(VCC = 5V, T = +25ºC, unless otherwise specified)WIPER RESISTANCE (W)SUPPLY CURRENT (mA)SUPPLY CURRENT

DS185517 of 20TYPICAL OPERATING CHARACTERISTICS (cont.)(VCC = 5V, T = +25ºC, unless otherwise specified)ATTENUATION (dB)END-TO-END RESISTANCE CHANGE (

DS185518 of 20TYPICAL OPERATING CHARACTERISTICS (cont.)(VCC = 5V, T = +25ºC, unless otherwise specified)SUPPLY CURRENT (mA)ACTIVE SUPPLY CURRENT vs. F

DS185519 of 20TYPICAL OPERATING CHARACTERISTICS (cont.)(VCC = 5V, T = +25ºC, unless otherwise specified)RESISTANCE vs. VOLTAGE (POWER-DOWN)010,00020,0

DS18552 of 20PIN DESCRIPTIONSName TSSOP BGA DescriptionVCC14 A3 Power Supply Terminal. The DS1855 will support supplyvoltages ranging f

DS185520 of 20ORDERING INFORMATIONORDERINGNUMBERPACKAGE OPERATINGTEMPERATUREVERSIONPot 0/Pot 1DS1855E-010 14-PIN TSSOP (173-MIL) -40ºC TO +85ºC10kW/10

DS18553 of 20DS1855 BLOCK DIAGRAM Figure 1Up to eight DS1855s can be installed on a single 2-wire bus. Access to an individual device is achievedby us

DS18554 of 20MEMORY ORGANIZATIONThe DS1855’s serial EEPROM is internally organized with 256 words of 1 byte each. Each word requiresan 8-bit address f

DS18555 of 20FBh – FCh Lock Bytes Writing to these two bytes allows the user to lock or unlock thememory described in byte FAh.LOCK: If memory locatio

DS18556 of 202-WIRE OPERATIONClock and Data TransitionsThe SDA pin is normally pulled high with an external resistor or device. Data on the SDA pin ma

DS18557 of 20The DS1855 is capable of an 8-byte page write. A page write is initiated the same way as a byte write, butthe master does not send a STOP

DS18558 of 202-WIRE SERIAL PORT OPERATIONThe 2-wire serial port interface supports a bidirectional data transmission protocol with deviceaddressing. A

DS18559 of 201. Data transfer from a master transmitter to a slave receiver. The first byte transmitted by the master isthe command/control byte. Nex