RV-8523 Datasheet, PDF (3/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
9.2. POWER MANAGEMENT ......................................................................................................................... 23
9.2.1. STANDBY MODE.............................................................................................................................. 23
9.2.2. BATTERY SWITCHOVER ................................................................................................................ 24
9.2.3. BATTERY LOW DETECTION........................................................................................................... 26
9.3. OSCILLATOR STOP FLAG..................................................................................................................... 27
9.4. DATA FLOW ON THE TIME FUNCTION ................................................................................................ 27
9.5. ALARM FLAG .......................................................................................................................................... 29
9.6. ALARM INTERRUPTS............................................................................................................................. 30
9.7. OFFSET .................................................................................................................................................... 31
9.7.1. CORRECTION WHEN MODE = 0 .................................................................................................... 31
9.7.2. CORRECTION WHEN MODE = 1 .................................................................................................... 32
9.7.3. OFFSET CALIBRATION WORKFLOW ............................................................................................ 33
9.8. CLKOUT FREQUENCY SELECTION ..................................................................................................... 34
9.9. TIMER ....................................................................................................................................................... 34
9.9.1. TIMER A ............................................................................................................................................ 35
9.9.2. TIMER B ............................................................................................................................................ 37
9.9.3. SECOND INTERRUPT TIMER ......................................................................................................... 38
9.9.4. TIMER INTERRUPT PULSE............................................................................................................. 39
9.10. STOP BIT FUNCTION.............................................................................................................................. 41
10.CHARACTERISTICS OF THE I²C BUS .......................................................................................................... 43
10.1. BIT TRANSFER ....................................................................................................................................... 43
10.2. START AND STOP CONDITIONS .......................................................................................................... 43
10.3. SYSTEM CONFIGURATION.................................................................................................................... 44
10.4. ACKNOWLEDGE ..................................................................................................................................... 44
11.I²C BUS PROTOCOL ....................................................................................................................................... 45
11.1. ADDRESSING .......................................................................................................................................... 45
11.2. CLOCK AND CALENDAR READ AND WRITE CYCLES ...................................................................... 45
11.2.1. WRITE MODE ................................................................................................................................... 45
11.2.2. READ MODE AT SPECIFIC ADDRESS........................................................................................... 46
11.2.3. READ MODE..................................................................................................................................... 46
12.ABSOLUTE MAXIMUM RATING .................................................................................................................... 47
13.FREQUENCY CHARACTERISTICS................................................................................................................ 47
13.1. FREQUENCY VS. TEMPERATURE CHARACTERISTICS .................................................................... 47
14.DC CHARACTERISTICS ................................................................................................................................. 48
15.I²C BUS INTERFACE TIMING ......................................................................................................................... 50
15.1. TIMING DIAGRAM ................................................................................................................................... 50
16.APPLICATION DIAGRAM ............................................................................................................................... 51
17.RECOMMENDED REFLOW TEMPERATURE (LEADFREE SOLDERING) .................................................. 52
18.PACKAGE ........................................................................................................................................................ 53
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