Question

时钟IC：DS1302的主电源是第1脚还是8脚

Answer 1

主电源是8脚

Answer 2

主电源是8脚，提供给芯片正常工作时候使用的电源。
1脚，称为后备电源，主电源断电后，提供给芯片，维持芯片中的计时电路继续工作。由于这部分电路消耗小，故而，小容量的电池能维持长久时间

Answer 3

8p Vcc1 1PVcc2,用于主电源和备份电源的双电源引脚,主电源是第8脚.

Answer 4

vcc2 看英文解释

SIGNAL DESCRIPTIONS
VCC1– VCC1 provides low power operation in single supply and battery operated systems as well as low
power battery backup. In systems using the trickle charger, the rechargeable energy source is connected
to this pin.

VCC2– Vcc2 is the primary power supply pin in a dual supply configuration. VCC1 is connected to a
backup source to maintain the time and date in the absence of primary power.

The DS1302 will operate from the larger of VCC1 or VCC2. When VCC2 is greater than VCC1 + 0.2V, VCC2
will power the DS1302. When VCC2 is less than VCC1, VCC1 will power the DS1302.