Rainbow-electronics DS1672 Manual de usuario

1 of 12 100302Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any

DS1672 10 of 12 2-Wire Serial Data Bus The DS1672 supports a bidirectional 2-wire bus and data transmission protocol. A device that sends data onto t

DS167211 of 12Figures 7 and 8 detail how data transfer is accomplished on the 2-wire bus. Depending upon the state ofthe R/ W bit, two types of data

DS167212 of 12Figure 6. Data Transfer on 2-Wire Serial BusMSBslave addressR/WdirectionbitSDASCLSTARTCONDITION12 678912 89STOP CONDITIONOR REPEATED STA

DS16722 of 12ABSOLUTE MAXIMUM RATINGSVoltage Range on Any Pin Relative to Ground -0.5V to +6.0VOperating Temperature Range -40°C to +85°CStorage Tempe

DS16723 of 12DC ELECTRICAL CHARACTERISTICS(VCC = 0V, TA = -40°C to +85°C)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESVBACKUP Current (Osc on) IBACKUPOSC0.

DS16724 of 12AC ELECTRICAL CHARACTERISTICS(VCC > VCCMIN, TA = -40°C to +85°C)PARAMETER SYMBOL CONDITION MIN TYP MAX UNITS NOTESFast Mode 100 400SCL

DS16725 of 12POWER-UP/POWER-DOWN CHARACTERISTICS(TA = -40°C to +85°C)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESVCC Detect to RST (VCC Falling)tRPD10 µ

DS1672 6 of 12 PIN DESCRIPTIONS PIN NAME FUNCTION 1, 2 X1, X2 32.768kHz Crystal Pins. These signals are connections for a standard 32.768kHz quar

DS16727 of 12OPERATIONThe block diagram in Figure 4 shows the main elements of the DS1672. As shown, communications toand from the DS1672 occur serial

DS16728 of 12Data Retention ModeThe device is fully accessible and data can be written and ready only when VCC is greater than VPF.However, when VCC f

DS16729 of 12Diode and resistor selection is determined by the user according to the maximum current desired forbattery or super cap charging. The max