DS1394U-33+;DS1390U-3+TR;DS1394U-33+TR;中文规格书,Datasheet资料.pdf

19-4898; Rev 3; 8/09 Low-Voltage SPI/3-Wire RTCs with Trickle Charger General Description ♦ Reset Output/Debounced Input (DS1391/DS1393) D The low-voltage serial-peripheral interface (SPI™) ♦ Separate SQW and INT Output (DS1392) S DS1390/DS1391/DS1394 and the low-voltage 3-wire ♦ Trickle-Charge Capability 1 3 DS1392/DS1393 real-time clocks (RTCs) are clocks/cal- ♦ SPI Supports Modes 0 and 2 (DS1394) 9 endars that provide hundredths of a second, seconds, minutes, hours, day, date, month, and year information. ♦ SPI Supports Modes 1 and 3 (DS1390/DS1391) The date at the end of the month is automatically ♦ 3-Wire Interface (DS1392/DS1393) 0 adjusted for months with fewer than 31 days, including – corrections for leap year. The clock operates in either ♦ 4MHz at 3.0V and 3.3V D the 24-hour or 12-hour format with an AM/PM indicator. ♦ 1MHz at 1.8V S 1 One programmable time-of-day alarm is provi