RV-3029 Datasheet, PDF (2/67 Pages) MICORO CRYSTAL SWITZERLAND – DTCXO Temperature Compensated Real Time Clock

Micro Crystal
DTCXO Temperature Compensated Real Time Clock / Calendar Module
RV-3029
TABLE OF CONTENTS
1. OVERVIEW ........................................................................................................................................................ 5
1.1. GENERAL DESCRIPTION......................................................................................................................... 5
1.2. APPLICATIONS ......................................................................................................................................... 5
2. BLOCK DIAGRAM............................................................................................................................................. 6
2.1. PINOUT ...................................................................................................................................................... 7
2.2. PIN DESCRIPTION .................................................................................................................................... 8
2.3. FUNCTIONAL DESCRIPTION................................................................................................................... 8
2.4. DEVICE PROTECTION DIAGRAM ........................................................................................................... 9
3. REGISTER ORGANIZATION .......................................................................................................................... 10
3.1. REGISTER OVERVIEW ........................................................................................................................... 10
3.2. CONTROL PAGE REGISTER FUNCTION.............................................................................................. 11
3.2.1. CONTROL_1 (address 00h…bits description).................................................................................. 11
3.2.2. CONTROL_INT (address 01h…bits description) .............................................................................. 11
3.2.3. CONTROL_INT FLAG (address 02h…bits description) ................................................................... 12
3.2.4. CONTROL_STATUS (address 03h…bits description) ..................................................................... 12
3.2.5. CONTROL_RESET (address 04h…bits description)........................................................................ 13
3.3. WATCH PAGE REGISTER FUNCTION .................................................................................................. 13
3.3.1. SECONDS, MINUTES, HOURS, DAYS, WEEKDAYS, MONTHS, YEARS REGISTER ................. 13
3.3.2. DATA FLOW OF TIME AND DATE FUNCTION............................................................................... 15
3.4. ALARM PAGE REGISTER FUNCTION .................................................................................................. 16
3.4.1. SECONDS, MINUTES, HOURS, DAYS, WEEKDAYS, MONTHS, YEARS ALARM REGISTER.... 16
3.5. TIMER PAGE REGISTER FUNCTION .................................................................................................... 18
3.6. TEMPERATURE PAGE REGISTER FUNCTION .................................................................................... 18
3.7. EEPROM DATA PAGE REGISTER FUNCTION..................................................................................... 18
3.8. EEPROM CONTROL PAGE REGISTER FUNCTION ............................................................................. 19
3.8.1. EEPROM CONTROL (address 30h…bits description) ..................................................................... 19
3.8.2. XTAL OFFSET (address 31h…bits description) ............................................................................... 19
3.8.3. XTAL TEMPERATUR COEFFICIENT (address 32h…bits description) ........................................... 19
3.8.4. XTAL TURNOVER TEMPERATUR COEFFICIENT T0 (address 33h…bits description)................. 20
3.9. RAM DATA PAGE REGISTER FUNCTION ............................................................................................ 20
4. DETAILED FUNCTIONAL DESCRIPTION ..................................................................................................... 21
4.1. POWER-UP, POWER MANAGEMENT AND BATTERY SWITCHOVER .............................................. 21
4.1.1. POWER UP SEQUENCE ................................................................................................................. 22
4.1.2. SUPPLY VOLTAGE OPERATING RANGE AND LOW VOLTAGE DETECTION ............................ 23
4.2. RESET ...................................................................................................................................................... 25
4.2.1. POWER-UP RESET, SYSTEM RESET AND SELF-RECOVERY RESET ...................................... 25
4.2.2. REGISTER RESET VALUES............................................................................................................ 26
4.3. EEPROM MEMORY ACCESS ................................................................................................................. 28
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