Rainbow-electronics DS1673 Manual de usuario

1 of 18 122800FEATURES Provides Real Time Clock:– Counts seconds, minutes, hours, date ofthe month, month, day of the week, andyear with leap year

DS167310 of 18CU BIT TIMING Figure 63-WIRE SERIAL INTERFACECommunication with the DS1673 is accomplished through a simple 3-wire interface consisting

DS167311 of 18SINGLE-BYTE DATA TRANSFER Figure 7MULTIPLE-BYTE BURST TRANSFER Figure 8

DS167312 of 18ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperature -55

DS167313 of 18DC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC=3.0V ±=10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESInput Leakage ILI-1 +1µACS Leakage

DS167314 of 18AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC=5.0V ±=10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESData to Clock Setup tDC50 ns 8CLK to

DS167315 of 18AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC=3.0V ±=10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESData to Clock Setup tDC150 ns 8CLK to

DS167316 of 18TIMING DIAGRAM: READ DATA Figure 9TIMING DIAGRAM: WRITE DATA Figure 10

DS167317 of 18PUSHBUTTON RESET Figure 11POWER-UP Figure 12POWER-DOWN Figure 13

DS167318 of 18NOTES:1. All voltages are referenced to ground.2. Logic 1 voltages are specified at VCC=3.0V, VOH=VCC for capacitive loads. Excludes R

DS16732 of 18Automatic backup and write protection of external SRAM is provided through the VCCO, CEOL , andCEOH pins. The backup energy source use

DS16733 of 18SIGNAL DESCRIPTIONSVCC, GND - DC power is provided to the device on these pins. VCC is the +3.0 volt or +5.0 volt input.VBAT (Backup Pow

DS16734 of 18X1, X2 - Connections for a standard 32.768 kHz quartz crystal. For greatest accuracy, the DS1673 mustbe used with a crystal that has a s

DS16735 of 18DS1673 ADDRESS MAP Figure 3CLOCK, CALENDAR AND ALARMThe time and calendar information is accessed by reading/writing the appropriate regi

DS16736 of 18TIME OF DAY ALARM BITS Table 1ALARM REGISTER MASK BITS (BIT 7)SECONDS MINUTES HOURS DAYS1 1 1 1 Alarm once per second.0 1 1 1 Alarm when

DS16737 of 18STATUS REGISTERBIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0CULOBAT00000IRQFCU (Conversion Update In Progress) - When this bit is a 1,

DS16738 of 18EXTERNAL SRAM INTERFACE (WORD-WIDE) TO THE DS1673 Figure 4MICROPROCESSOR MONITORThe DS1673 monitors three vital conditions for a micropro

DS16739 of 18WATCHDOG TIME-OUT CONTROL Figure 5WATCHDOG REGISTERBIT 7 BIT 6 BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0000000TD1TD0WATCHDOG REGISTERTD1 TD0 WA