Rainbow-electronics DS1602 Manuel d'utilisateur télécharger pdf (Page 4)

DS1602

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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.

BAT

– Battery input for any standard 3V lithium cell or other energy source. Battery voltage must be

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 1.25 x V

BAT

nominal. UL recognized to

ensure against reverse charging current when used in conjunction with a lithium battery. See “Conditions

of Acceptability” at www.maxim-ic.com/TechSupport/QA/ntrl.htm.

Figure 1. ELAPSED TIME COUNTER BLOCK DIAGRAM

Figure 2. PROTOCOL BIT MAP

7 6 5 4 3 2 1 0

ACC AVC OSC2

OSC1 OSC0

CCC CVC RD

1 2 3 4 5 6 7 8

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Rainbow-electronics DS1602 Manuel d'utilisateur Page 4