Table of Contents
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RX8804CE
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
7.3. Reference Characteristics ..................................................................................................................................... 6
7.3.1 Temperature Compensation and Consumption Current .............................................................................. 6
vs TC Characteristics for Reference. .................................................................................................... 6
8. Use Methods ............................................................................................................................................ 7
8.1. Description of Registers ......................................................................................................................................... 7
8.1.1. Write / Read and Bank Select .................................................................................................................... 7
8.1.2. Register Table (Basic time and calendar register) ..................................................................................... 7
8.1.3. Register Table (Time stamp, EVIN, SOUT, Timer) .................................................................................... 8
8.1.4. Quick Reference ........................................................................................................................................ 8
8.1.5 Initial Value of Registers.............................................................................................................................. 8
8.2.1. Clock Counter (SEC - YEAR) ..................................................................................................................... 9
8.2.2. Alarm Registers ........................................................................................................................................ 10
8.2.3. Wakeup Timer Control Registers ............................................................................................................. 11
8.2.4. Control Registers, Flag Registers ............................................................................................................ 11
8.2.5. SOUT Control Register ............................................................................................................................ 13
8.2.6. Time Stamp Data Event Controller Register ............................................................................................ 14
8.3. SOUT Function .................................................................................................................................................... 17
8.3.1. 2 Kinds of SOUT Function ........................................................................................................................ 17
8.3.2. SOUT Function Program ex.1 .................................................................................................................. 17
8.3.3. SOUT Function Program ex.2 .................................................................................................................. 18
8.4. EVIN Interrupt and Time Stamp Function ............................................................................................................ 19
8.4.1. Time Stamp Program ex. ......................................................................................................................... 19
8.4.2. Timing Chart of EVIN Time Stamping. ..................................................................................................... 20
8.4.3. /INT pin Operation when an Interrupt Occurs. .......................................................................................... 20
8.5. Alarm Interrupt Function ...................................................................................................................................... 21
8.5.1. Alarm Interrupt Function ........................................................................................................................... 21
8.5.2. Alarm Interrupt Function Register ............................................................................................................ 21
8.5.3. Examples of Alarm Settings ..................................................................................................................... 22
8.5.4. Alarm Interrupt Timing Chart. ................................................................................................................... 23
8.5.5. /INT pin Operation when an Interrupt Occurs. .......................................................................................... 24
8.6. Wakeup Timer Interrupt Function ........................................................................................................................ 24
8.6.1. Wakeup Timer Interrupt Function ............................................................................................................. 24
8.6.2. Wakeup Timer Interruption Registers ....................................................................................................... 24
8.6.3. Wakeup Timer Start Timing ...................................................................................................................... 26
8.3.4. Wakeup Timer Interrupt Interval (example) .............................................................................................. 27
8.3.5. Wakeup Timer Interrupt Timing Chart ...................................................................................................... 27
8.7. Time Update Interrupt Function ........................................................................................................................... 29
8.7.1. Time Update Interrupt Function ................................................................................................................ 29
8.7.2. Related Registers for Time Update Interrupt Functions. .......................................................................... 29
8.7.3. Time Update Interrupt Function Timing Chart .......................................................................................... 30
8.8. Temperature Compensation Function. ................................................................................................................ 31
8.8.1. Temperature Compensation Function ...................................................................................................... 31
8.8.2. Related Registers for Temperature Compensation Function ................................................................... 31
8.9.2. System Configuration ............................................................................................................................... 32
8.9.5. Slave Address .......................................................................................................................................... 35
2
C-Bus Protocol ....................................................................................................................................... 36
8.10. Backup and Recovery ........................................................................................................................................ 37
8.11. About Access at the Time of Backup Return and Initial Power Supply .............................................................. 38
8.12. Flow Chart ......................................................................................................................................................... 39
8.13. Connection with Typical Microcontroller ............................................................................................................ 42
Table of Contents
2
C-Bus Active Current. ................................................................................... 6
2
C-Bus Interface ................................................................................................. 32
2
C-Bus ................................................................................................................................. 32
2
C-Bus Communications ...................................................................................... 33
2
C-Bus Communications ...................................... 34
ETM59E-05
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