DS1302SN16 Dallas Semiconductor, DS1302SN16 Datasheet
DS1302SN16
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DS1302SN16 Summary of contents
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... Trickle-Charge Timekeeping Chip PIN CONFIGURATIONS TOP VIEW V GND V GND SO (208 mils/150 mils) V N.C. TOP MARK* N.C. DS1302 DS1302 N.C. DS1302 N.C. GND DS1302 DS1302S DS1302S DS1302S DS1302S DS1302Z DS1302Z DS1302ZN DS1302ZN DS1302S16 DS1302SN16 DS1302 CC1 CC2 SCLK I DIP (300 mils CC2 CC1 ...
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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 CC1 GND I/O SCLK CE TYPICAL OPERATING CHARACTERISTICS (V = 3.3V +25°C, unless otherwise noted vs. V CC1T CC1T 400 350 300 250 200 150 100 2.0 ...
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PIN DESCRIPTION PIN NAME 8 16 Primary Power-Supply Pin in Dual Supply Configuration. V backup source to maintain the time and date in the absence of primary power. The DS1302 operates from the larger of V CC2 ...
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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 2 shows a functional schematic of the ...
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COMMAND BYTE Figure 4 shows the command byte. A command byte initiates each data transfer. The MSB (bit 7) must be a logic writes to the DS1302 will be disabled. Bit 6 specifies clock/calendar data ...
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The day-of-week register increments at midnight. Values that correspond to the day of week are user-defined but must be sequential (i.e equals Sunday, then 2 equals Monday, and so on.). Illogical time and date entries result in undefined ...
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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 2) starting with bit 0 of address 0. If the write-protect bit is ...
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Table 2. 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 7. Timing Diagram: Read Data Transfer SCLK t CDH RITE COM M AND BYTE Figure 8. Timing Diagram: Write Data Transfer SCLK CDH ...
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PACKAGE INFORMATION (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/DallasPackInfo ...
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PACKAGE INFORMATION (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/DallasPackInfo ...
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PACKAGE INFORMATION (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/DallasPackInfo ...
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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 © 2005 Maxim Integrated Products • Printed USA ...