DS1302Z Maxim Integrated Products, DS1302Z Datasheet
DS1302Z
Specifications of DS1302Z
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DS1302Z Summary of contents
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... SO (208 mils) 0°C to +70° (150 mils) -40°C to +85° (150 mils TOP VIEW CC2 SCLK I GND 4 5 DIP (300 mils CC2 CC1 SCLK I/O GND (208 mils/150 mils) TOP MARK* DS1302 DS1302 DS1302S DS1302S DS1302Z DS1302ZN DS1302 CC1 REV: 120208 ...
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DETAILED DESCRIPTION The DS1302 trickle-charge timekeeping chip contains a real-time clock/calendar and 31 bytes of static RAM. It communicates with a microprocessor via a simple serial interface. The real-time clock/calendar provides seconds, minutes, hours, day, date, month, and year information. ...
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Figure 1. Block Diagram v POWER CC1 v CONTROL CC2 GND CE INPUT SHIFT I/O REGISTERS CONTROL LOGIC SCLK TYPICAL OPERATING CHARACTERISTICS (V = 3.3V +25°C, unless otherwise noted vs. V CC1T CC1T 400 350 ...
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PIN DESCRIPTION PIN NAME Primary Power-Supply Pin in Dual Supply Configuration. V backup source to maintain the time and date in the absence of primary power. The 1 V DS1302 operates from the larger of V CC2 0.2V, V powers ...
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OSCILLATOR CIRCUIT The DS1302 uses an external 32.768kHz crystal. The oscillator circuit does not require any external resistors or capacitors to operate. Table 1 specifies several crystal parameters for the external crystal. Figure 1 shows a functional schematic of the ...
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CE AND CLOCK CONTROL Driving the CE input high initiates all data transfers. The CE input serves two functions. First, CE turns on the control logic that allows access to the shift register for the address/command sequence. Second, the CE ...
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CLOCK HALT FLAG Bit 7 of the seconds register is defined as the clock halt (CH) flag. When this bit is set to logic 1, the clock oscillator is stopped and the DS1302 is placed into a low-power standby mode ...
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CLOCK/CALENDAR BURST MODE The clock/calendar command byte specifies burst mode operation. In this mode, the first eight clock/calendar registers can be consecutively read or written (see Table 3) starting with bit 0 of address 0. If the write-protect bit is ...
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Table 3. Register Address/Definition RTC READ WRITE BIT 7 BIT 6 81h 80h CH 83h 82h 12/ 24 85h 84h 0 87h 86h 0 0 89h 88h 0 0 8Bh 8Ah 0 0 8Dh 8Ch 8Fh 8Eh WP 0 91h ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground……………………………………………………………….-0.5Vto +7.0V Operating Temperature Range, Commercial………………………………………………………………….0°C to +70°C Operating Temperature Range, Industrial (IND)……………………………………………………………-40°C to +85°C Storage Temperature Range……………………………………………………………………………..….-55°C to +125°C Soldering Temperature (leads, 10 seconds)………………………………………………………………..………….260°C Soldering Temperature (surface mount)………………………………………………..…….See IPC/JEDEC ...
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CAPACITANCE (T = +25°C) A PARAMETER SYMBOL Input Capacitance C I/O Capacitance C AC ELECTRICAL CHARACTERISTICS (T = 0°C to +70° -40°C to +85°C.) (Note PARAMETER Data to CLK Setup CLK to Data Hold ...
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Figure 6. Timing Diagram: Read Data Transfer SCLK CDH t DC I/O ADDRESS/COMMAND BYTE Figure 7. Timing Diagram: Write Data Transfer SCLK CDH t ...
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... No circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time The Maxim logo is a registered trademark of Maxim Integrated Products, Inc. The Dallas logo is a registered trademark of Dallas Semiconductor Corporation. DS1302 Trickle-Charge Timekeeping Chip ...