DS1602 Maxim Integrated Products, DS1602 Datasheet
DS1602
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DS1602 Summary of contents
Page 1
... DS1602 is used. Alternatively, this counter can also be used under software control to record real-time eve nts. Communication to and from the DS1602 takes place via a 3-wire serial port. A 1-byte protocol selects read/ write functions, counter clear functions and oscillator trim. A low cost 32 ...
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... OPERATION The main elements of the DS1602 are shown in Figure 1. As shown, communications to and from the elapsed time counter occur over a 3-wire serial port. The port is activated by driving With at high level, 8 bits are loaded into the protocol shift register providing read/write, register RST select, register clear, and oscillator trim information ...
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... Data is driven out the DQ pin as long as CLK is low. When CLK is high the DQ pin is tristated. CRYSTAL SELECTION A standard 32.768kHz quartz crystal can be directly connected to the DS1602 via pins 1 and 2 (X1, X2). The crystal selected for use should have a specified load capacitance (C on crystal selection and crystal layout considerations, please consult Application Note 58: Crystal Considerations with Dallas Real-Time Clocks ...
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... Dallas Real-Time Clocks. The DS1602 can also be driven by an external 32.768kHz oscillator. In this configuration, the X1 pin is connected to the external oscillator signal and the X2 pin is floated. V – Battery input for any standard 3V lithium cell or other energy source. Battery voltage must be BAT held between 2.5V and 3.5V for proper operation. The nominal write-protect trip-point voltage at which access to the DS1602 is denied is set by the internal circuitry as 1. ensure against reverse charging current when used in conjunction with a lithium battery. See “ ...
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... DS1602 FUNCTION CVC RD Output continuous counter on the 32 clocks following protocol Oscillator trim register is not updated. Counters are not reset. Input data to continuous counter on the 32 clocks following protocol Oscillator trim register is not updated. Counters are not reset. Output V active CC counter on the 32 clocks ...
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... Figure 3. DATA TRANSFER TIMING DIAGRAM: READ/WRITE DATA TRANSFER Note and t apply to both read and write data transfer DS1602 ...
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... BATL V 1.216 BAT SYMBOL MIN TYP I (-40°C to +85°C) MAX UNITS 5 0.8 V (-40°C to +85° MAX UNITS +1 µA +1 µ µA 400 nA 100 nA V 1.285 x V BAT BAT (t MAX UNITS DS1602 NOTES ±10%) NOTES +25°C) A NOTES 10 ...
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... CDH t CDD t 250 CL t 250 CLK 100 CCH t 1 CWH t RDZ t CDZ = GND. RST and V within DC recommended operating conditions. BAT BAT = 0.8V 0.4V +5V ±10%; -40°C to 85°C) CC MAX UNITS NOTES ns ns 200 2.0 MHz 500 µ not present and the CC DS1602 ...