RTC – 4553AC
CONTETS
1. Overview..........................................................................................1
2. Block Diagram .................................................................................1
3. Terminal description ........................................................................2
3.1. Terminal connections ........................................................................................ 2
3.2. Terminal functions............................................................................................. 2
4. Absolute maximum ratings...............................................................3
5. Recommended operating conditions................................................3
6. Frequency characteristics ................................................................3
7. Electrical characteristics ..................................................................4
7.1. DC, AC Characteristics ..................................................................................... 4
7.1.1. V
DD
= 5 V........................................................................................................................... 4
7.1.2. V
DD
= 3 V........................................................................................................................... 5
7.2. Timing Chart ..................................................................................................... 6
8. How to use.......................................................................................7
8.1. Registers........................................................................................................... 7
8.1.1. Register Table ................................................................................................................... 7
8.1.2. Register Bit Functions ....................................................................................................... 8
8.2. Register Description.......................................................................................... 9
8.2.1. Time/Calendar Counter Registers ..................................................................................... 9
8.2.2. Control Registers ............................................................................................................. 10
8.3. How to use ...................................................................................................... 12
8.3.1. Data Read ....................................................................................................................... 12
8.3.2. Data Write/Modify ............................................................................................................ 12
8.3.3. Initialize............................................................................................................................ 12
8.3.4. Timing Pulse Output ........................................................................................................ 12
8.3.5. Sample Operation Flow Charts........................................................................................ 13
8.3.6. CS1 and CS0 Operation................................................................................................. 15
8.3.7. System Power Down During Interface Operation ............................................................ 15
8.3.8. Power Supply and CS1 Operation ................................................................................... 15
8.3.9. Power-On Reset .............................................................................................................. 16
8.3.10. Power Supply Connection Example .............................................................................. 16
8.3.11. Processing of Non-Existent Data................................................................................... 17
8.3.12. Timing Charts ................................................................................................................ 18
9. External dimensions / Marking layout ............................................21
9.1. External dimensions........................................................................................ 21
9.2. Marking layout................................................................................................. 21
10. Reference Data ...........................................................................22
11. Application notes .........................................................................23
11.1. Notes on handling ......................................................................................... 23
11.2. Notes on packaging ...................................................................................... 23
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