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RX
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8581
SA
/
JE
/
NB
Contents
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
....................................................................................3
7.1. DC characteristics
.........................................................................................................................3
7.2. AC Characteristics
....................................................................................................................4
8. Use Methods
...........................................................................................................5
8.1. Overview of Functions
.............................................................................................................5
8.2. Description of Registers
.........................................................................................................6
8.3. Fixed-cycle Timer Interrupt Function
................................................................................13
8.4. Time Update Interrupt Function
.........................................................................................16
8.5. Alarm Interrupt Function
.......................................................................................................18
8.6. Reading/Writing Data via the I
2
C Bus Interface
...........................................................21
8.7. Backup and Recovery
...........................................................................................................25
8.8. Connection with Typical Microcontroller
..........................................................................25
9. External Dimensions / Marking Layout
........................................................26
10. Reference Data
.................................................................................................27
11. Application notes
..............................................................................................28
11.1. Notes on handling
................................................................................................................28
11.2. Notes on packaging
.............................................................................................................28