DS1321 데이터 시트보기 (PDF) - Maxim Integrated
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DS1321 Datasheet PDF : 13 Pages
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DS1321
FRESHNESS SEAL MODE
When the battery is first attached to the DS1321 without VCC power applied, the device does not
immediately provide battery-backup power on VCCO. Only after VCCI exceeds VCCTP will the DS1321
leave Freshness Seal Mode. This mode allows a battery to be attached during manufacturing but not used
until after the system has been activated for the first time. As a result, no battery energy is drained during
storage and shipping.
FUNCTIONAL BLOCK DIAGRAM Figure 2
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