Table of Contents
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RA8804 CE
1. Overview...................................................................................................................................................... 1
2. Block Diagram ............................................................................................................................................. 1
3. Terminal description .................................................................................................................................... 2
3.1. Terminal connections ................................................................................................................................................. 2
3.2. Pin Functions ............................................................................................................................................................. 2
4. Absolute Maximum Ratings ........................................................................................................................ 3
5. Recommended Operating Conditions ......................................................................................................... 3
6. Frequency Characteristics .......................................................................................................................... 3
7. Electrical Characteristics ............................................................................................................................. 4
7.1. DC Characteristics ..................................................................................................................................................... 4
7.2. AC characteristics ...................................................................................................................................................... 5
8. Use Methods ............................................................................................................................................... 6
8.1. Description of Registers ............................................................................................................................................. 6
8.1.1. Write/Read and Bank Select .......................................................................................................................... 6
8.1.2. Register table (Basic time and calendar register) ........................................................................................... 6
8.1.3. Register table (Time stamp, EVIN, SOUT, Timer) .......................................................................................... 7
8.1.4. Quick Reference ............................................................................................................................................ 7
8.2. Details of Registers .................................................................................................................................................... 8
8.2.1. Clock counter (SEC - HOUR) ......................................................................................................................... 8
8.2.3. Alarm registers ............................................................................................................................................. 10
8.2.4. Fixed-cycle timer control registers ................................................................................................................ 10
8.2.5. Extension register ........................................................................................................................................ 10
8.2.6. Flag register ................................................................................................................................................. 11
8.2.7. Control register ............................................................................................................................................. 13
8.3. Fixed-cycle Timer Interrupt Function ....................................................................................................................... 15
8.3.1. Diagram of fixed-cycle timer interrupt function ............................................................................................. 15
8.3.2. Related registers for function of fixed-cycle timer interruption ...................................................................... 16
8.3.3. Timer register ............................................................................................................................................... 16
8.3.4. Fixed-cycle timer interrupt interval (example) ............................................................................................... 18
8.3.5. Fixed-cycle timer start timing ........................................................................................................................ 18
8.4. EVIN Interrupt and Time stamp Function ................................................................................................................. 19
8.4.1. Diagram of EVIN interrupt function ............................................................................................................... 19
8.4.2. Operation example of Time-Stamp function. ................................................................................................ 20
8.4.3. Related registers for EVIN Interrupt and Time stamp Function .................................................................... 20
8.5. SOUT Interrupt Function .......................................................................................................................................... 23
8.5.1. Operation example of SOUT function. ......................................................................................................... 23
8.5.2. Related registers for SOUT interrupt functions. ............................................................................................ 24
8.6. Time Update Interrupt Function ............................................................................................................................... 25
8.6.1. Time update interrupt function diagram ........................................................................................................ 25
8.6.2. Related registers for time update interrupt functions. ................................................................................... 26
8.7. Alarm Interrupt Function .......................................................................................................................................... 27
8.7.1. Diagram of alarm interrupt function .............................................................................................................. 27
8.7.2. Related registers for Alarm interrupt function ............................................................................................... 28
8.7.3. Examples of alarm settings .......................................................................................................................... 29
8.8. About the interrupt function for operation /INT = "L" interrupt output. ...................................................................... 30
8.9. Temperature compensation function. ...................................................................................................................... 30
8.9.1. Temperature compensation function ............................................................................................................ 30
8.9.2. Related registers for temperature compensation function ............................................................................ 30
8.10.1. Overview of I2C-BUS ................................................................................................................................. 31
8.10.2. System configuration .................................................................................................................................. 31
8.10.5. Slave address ............................................................................................................................................ 33
2
C bus protocol .......................................................................................................................................... 34
8.11. Backup and Recovery ............................................................................................................................................ 35
8.12. About access at the time of backup return and Initial power supply ...................................................................... 36
8.13. Flow chart .............................................................................................................................................................. 37
8.14. Connection with Typical Microcontroller ................................................................................................................ 40
8.15. When used as a clock source (32 kHz-TCXO) ...................................................................................................... 40
9. External Dimensions/Marking Layout...................................................................................................... 41
9.1. RX8804CE .............................................................................................................................................................. 41
9.1.1. External dimensions ..................................................................................................................................... 41
9.1.2. Marking layout .............................................................................................................................................. 41
10. Application notes ..................................................................................................................................... 42
Table of Contents
2
C Bus Interface ..................................................................................................... 31
2
C bus communications .......................................................................................... 32
2
C-BUS communications .......................................... 33
ETM60E-02
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