MIKROE-3456

RV-3028-C7 Application Manual Application Manual RV-3028-C7 Extreme Low Power Real-Time Clock Module 2 with I C-Bus Interface August 2018 1/107 Rev. 1.0 Micro Crystal Extreme Low Power Real-Time Clock Module RV-3028-C7 TABLE OF CONTENTS 1. OVERVIEW ....................................................................................................................................................... 6 1.1. GENERAL DESCRIPTION ......................................................................................................................... 6 1.2. APPLICATIONS ......................................................................................................................................... 7 1.3. ORDERING INFORMATION ...................................................................................................................... 7 2. BLOCK DIAGRAM ............................................................................................................................................ 8 2.1. PINOUT ...................................................................................................................................................... 9 2.2. PIN DESCRIPTION .................................................................................................................................... 9 2.3. FUNCTIONAL DESCRIPTION ................................................................................................................. 10 2.4. DEVICE PROTECTION DIAGRAM ......................................................................................................... 10 3. REGISTER ORGANIZATION ......................................................................................................................... 11 3.1. REGISTER CONVENTIONS .................................................................................................................... 11 3.2. REGISTER OVERVIEW ........................................................................................................................... 12 3.3. CLOCK REGISTERS ............................................................................................................................... 14 3.4. CALENDAR REGISTERS ........................................................................................................................ 15 3.5. ALARM REGISTERS ............................................................................................................................... 17 3.6. PERIODIC COUNTDOWN TIMER CONTROL REGISTERS .................................................................. 19 3.7. CONFIGURATION REGISTERS.............................................................................................................. 21 3.8. EVENT CONTROL REGISTER ............................................................................................................... 25 3.9. TIME STAMP REGISTERS ...................................................................................................................... 26 3.10. UNIX TIME REGISTERS .......................................................................................................................... 29 3.11. RAM REGISTERS .................................................................................................................................... 30 3.12. PASSWORD REGISTERS ....................................................................................................................... 31 3.13. EEPROM MEMORY CONTROL REGISTERS ........................................................................................ 32 3.14. ID REGISTER ........................................................................................................................................... 33 3.15. CONFIGURATION EEPROM WITH RAM MIRROR REGISTERS .......................................................... 33 3.15.1. EEPROM RESERVED ...................................................................................................................... 33 3.15.2. EEPROM PASSWORD ENABLE REGISTER .................................................................................. 33 3.15.3. EEPROM PASSWORD REGISTERS ............................................................................................... 34 3.15.4. EEPROM CLKOUT REGISTER ........................................................................................................ 35 3.15.5. EEPROM OFFSET REGISTER ........................................................................................................ 36 3.15.6. EEPROM BACKUP REGISTER ....................................................................................................... 37 3.16. USER EEPROM ....................................................................................................................................... 38 3.17. MANUFACTURER EEPROM ................................................................................................................... 38 3.18. REGISTER RESET VALUES SUMMARY ............................................................................................... 39 4. DETAILED FUNCTIONAL DESCRIPTION .................................................................................................... 42 4.1. POWER ON RESET (POR) ...................................................................................................................... 42 4.2. AUTOMATIC BACKUP SWITCHOVER FUNCTION............................................................................... 43 4.2.1. SWITCHOVER DISABLED ............................................................................................................... 43 August 2018 2/107 Rev. 1.0