Rainbow-electronics DS1677 Manual de usuario Pagina 1

1 of 17 122800FEATURES Provides Real Time Clock:- Counts seconds, minutes, hours, date ofthe month, month, day of the week, andyear with leap year c

DS167710 of 17CU BIT TIMING Figure 53–WIRE SERIAL INTERFACECommunication with the DS1677 is accomplished through a simple 3–wire interface consisting

DS167711 of 17SINGLE BYTE DATA TRANSFER Figure 6MULTIPLE BYTE BURST TRANSFER Figure 7POWER–FAIL COMPARATOR Figure 8=

DS167712 of 17ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground –0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperature –55

DS167713 of 17CAPACITANCE (tA=25°C)PARAMETER SYMBOL MIN TYP MAX

DS167714 of 17TIMING DIAGRAM: READ DATA Figure 9TIMING DIAGRAM: WRITE DATA Figure 10PUSH–BUTTON RESET Figure 11

DS167715 of 17POWER–UP Figure 12POWER–Down Figure 13

DS167716 of 17POWER–FAIL WARNING Figure 14NOTES:1. All voltages are referenced to ground.2. ICCA is specified with outputs open, CS set to a logic

DS167717 of 1720 – PIN TSSOPPKG 20-PINDIM MIN MAXA MM-1.10A1 MM0.05 -A2 MM0.75 1.05C MM0.09 0.18L MM0.50 0.70e1 MM0.65 BSCB MM0.18 0.30D MM6.40 6.90E

DS16772 of 17Automatic backup and write protection of an external SRAM is provided through the VCCO and CE0 pins.The backup energy source used to pow

DS16773 of 17SIGNAL DESCRIPTIONSVCC, GND – DC power is provided to the device on these pins. VCC is the +5.0 volt input.VBAT (Backup Power Supply) –

DS16774 of 17X1, X2 – Connections for a standard 32.768 kHz quartz crystal. For greatest accuracy, the DS1677 mustbe used with a crystal that has a s

DS16775 of 17DS1677 ADDRESS MAP Figure 3BIT7 BIT000 0 10 SECONDS SECONDS01 0 10 MINUTES MINUTES02012 2410 HRA/P10 HR HOURS03 0 0 0 0 0 DAY04 0 0 1

DS16776 of 17TIME 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

DS16777 of 17CU (Conversion Update In Progress) – When this bit is a one, an update to the ADC Register(register 0Eh) will occur within 488 µs. When

DS16778 of 17MICROPROCESSOR MONITORThe DS1677 monitors three vital conditions for a micro-processor: power supply, software execution, andexternal ove

DS16779 of 17ANALOG–TO–DIGITAL CONVERTERThe DS1677 provides a 3–channel 8–bit analog–to–digital converter. The A/D reference voltage (2.55volt typica