Rainbow-electronics DS1384 Manual do Utilizador

1 of 17 091300FEATURES Keeps track of hundredths of seconds,seconds, minutes, hours, days, date of themonth, months, and years with leap yearcompens

DS138410 of 17WAM - Bit 3 Watchdog Alarm Mask - When this bit is set to a logic 0, the Watchdog Interrupt outputwill be activated. The activated stat

DS138411 of 17ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +7.0VOperating Temperature 0°C to 70°CStorage Temperature -20°C

DS138412 of 17AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC = 5.0V ±10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESRead Cycle Time tRC120 nsAddress Acc

DS138413 of 17CAPACITANCE (tA = 25°C)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESCapacitance on all pins(except DQ)CI715 pFCapacitance on DQ pins CDQ715 p

DS138414 of 17OER TIMING WHEN SWITCHING BETWEEN LOWER MEMORY (00000h-0003Fh) AND UPPER MEMORY (00040h-1FFFFh)WRITE CYCLE TIMING: RTC AND EXTERNAL SRA

DS138415 of 17TIMING DIAGRAM: POWER UPTIMING DIAGRAM: POWER DOWN

DS138416 of 17TIMING DIAGRAM: INTERRUPT OUTPUTS PULSE MODE (SEE NOTES 8, 9)NOTES:1. All voltages are referenced to ground.2. Typical values are at 2

DS138417 of 17DS1384 FP PACKAGE OUTLINESNOTES:1. DIMENSIONS D1 AND E1 INCLUDEMOLD MISMATCH, BUT DO NOTINCLUDE MOLD PROTRUSION;ALLOWABLE PROTRUSION IS

DS13842 of 17DESCRIPTIONThe DS1384 Watchdog Timekeeping Controller is a self-contained real time clock, alarm, watchdogtimer, and interval timer which

DS13843 of 17VCCO - Switched DC power for SRAM (output): This pin will be connected to VCC when VCC voltage isabove VSO (the greater of VBAT1 or VBAT2

DS13844 of 17For more information on crystal selection and crystal layout considerations, please consult ApplicationNote 58, “Crystal Considerations w

DS13845 of 17When the address value presented to the DS1384 during the write is in the range of 00000H through0003FH, one of the 64 on-chip registers

DS13846 of 17DS1384 BLOCK DIAGRAM Figure 1

DS13847 of 17DS1384 WATCHDOG TIMEKEEPER REGISTERS Figure 2

DS13848 of 17TIME OF DAY ALARM MASK BITS Figure 3REGISTERMINUTES HOURS DAYS1 1 1 ALARM ONCE PER MINUTE0 1 1 ALARM WHEN MINUTES MATCH0 0 1 ALARM WHEN H

DS13849 of 17TIME OF DAY ALARM REGISTERSRegisters 3, 5, and 7 contain the time of day alarm registers. Bits 3, 4, 5, and 6 of register 7 will alwaysr