Rainbow-electronics DS1670 Bedienungsanleitung

1 of 17 122800FEATURES Provides real time clock:− Counts seconds, minutes, hours, date ofthe month, month, day of the week, andyear with leap year

DS167010 of 17The Conversion Update In Progress (CU) bit in the Status Register indicates when the ADC Register canbe read. When this bit is a 1, an

DS167011 of 17Data transfers can occur 1 byte at a time or in multiple-byte burst mode. After CS is driven high anaddress is written to the DS1670.

DS167012 of 17ABSOLUTE MAXIMUM RATINGS*Voltage on Any Pin Relative to Ground -0.3V to +6VOperating Temperature 0°C to 70°CStorage Temperature -55°C

DS167013 of 17DC ELECTRICAL CHARACTERISTICS (0°C to 70°C)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESInput Leakage ILI-1 +1µACS Leakage ILO150µA7Logic 1

DS167014 of 17AC ELECTRICAL CHARACTERISTICS (0°C to 70°C; VCC = 3.3V ± 10%)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESData to Clock Setup tDC100 ns 8CLK

DS167015 of 17TIMING DIAGRAM: READ DATA Figure 9TIMING DIAGERAM: WRITE DATA Figure 10

DS167016 of 17PUSHBUTTON RESET Figure 11POWER-UP Figure 12POWER-DOWN Figure 13RSTVOHtRSTPBDBPBDVPBRDVCCVCCTPtRPUVOHRSTVCCRSTVCCTPMAXVOLtRPDtFBVCCTP

DS167017 of 17NOTES:1. All voltages are referenced to ground.2. Logic 1 voltages are specified at VCC =3.3V, VOH =VCC for capacitive loads. Excludes

DS16702 of 17The microprocessor monitor circuitry of the DS1670 provides three basic functions. First, a precisiontemperature-compensated reference a

DS16703 of 17CS (Chip Select) - The Chip Select signal must be asserted high during a read or a write forcommunication over the 3-wire serial interfac

DS16704 of 17POWER-UP/POWER-DOWN CONSIDERATIONSThe DS1670 was designed to operate with a power supply of 3.3 volts. When 3.3 volts are applied within

DS16705 of 17CLOCK, CALENDAR AND ALARMThe time and calendar information is accessed by reading/writing the appropriate register bytes. Notethat some

DS16706 of 17AIS0-AIS1 (Analog Input Select) - These 2 bits are used to determine the analog input for the analog-to-digital conversion. Table 2 list

DS16707 of 17The DS1670 nonvolatilizes the external SRAM(s) by write protecting the SRAM(s) and by providing aback-up power supply in the absence of V

DS16708 of 17EXTERNAL SRAM CHIP ENABLE Table 3CEIBHE BLECEOL CEOHFUNCTION0 0 0 0 0 Word Transfer0 0 1 1 0 Byte Transfer in upper half of databus (D15-

DS16709 of 17The third microprocessor monitoring function provided by the DS1670 is a watchdog timer. Thewatchdog timer function forces RST to the a