Epson RX-8801SA/JE Contents, RX - 8801 SA / JE, 2. Block Diagram, 10. Application notes, 3. Terminal description, 4. Absolute Maximum Ratings, 6. Frequency Characteristics

RX - 8801 SA / JE

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 .................................................................................................	4
7.1. DC Characteristics............................................................................................................................	4
7.2. AC Characteristics ............................................................................................................................	5
8. Use Methods....................................................................................................................	6
8.1. Overview of Functions ......................................................................................................................	6
8.2. Description of Registers....................................................................................................................	7
8.2.1. Register table .....................................................................................................................	7
8.2.2. Control register (Reg F)......................................................................................................	8
8.2.3. Flag register (Reg-E) ........................................................................................................	10
8.2.4. Extension register (Reg-D) ...............................................................................................	11
8.2.5. RAM register (Reg - 7) .....................................................................................................	12
8.2.6. Clock counter (Reg - 0 ∼ 2)...............................................................................................	12
8.2.7. Day counter (Reg - 3) .......................................................................................................	12
8.2.8. Calendar counter (Reg 4 to 6) ..........................................................................................	13
8.2.9. Alarm registers (Reg - 8 ∼ A) ............................................................................................	13
8.2.10. Fixed-cycle timer control registers (Reg - B to C) ...........................................................	13
8.3. Fixed-cycle Timer Interrupt Function...............................................................................................	14
8.3.1. Diagram of fixed-cycle timer interrupt function..................................................................	14
8.3.2. Related registers for function of time update interrupts. ...................................................	15
8.3.3. Fixed-cycle timer interrupt interval (example) ...................................................................	16
8.3.4. Fixed-cycle timer start timing ............................................................................................	16
8.4. Time Update Interrupt Function ......................................................................................................	17
8.4.1. Time update interrupt function diagram ............................................................................	17
8.4.2. Related registers for time update interrupt functions. .......................................................	18
8.5. Alarm Interrupt Function .................................................................................................................	19
8.4.1. Diagram of alarm interrupt function ..................................................................................	19
8.5.2. Related registers ..............................................................................................................	20
8.5.2. Examples of alarm settings...............................................................................................	21
8.6. Reading/Writing Data via the I2C Bus Interface..............................................................................	22
8.6.1. Overview of I2C-BUS .......................................................................................................	22
8.6.2. System configuration ........................................................................................................	22
8.6.3. Starting and stopping I2C bus communications ................................................................	23
8.6.4. Data transfers and acknowledge responses during I2C-BUS communications ................	24
8.6.5. Slave address...................................................................................................................	24
8.6.6. I2C bus protocol ................................................................................................................	25
8.7. Backup and Recovery.....................................................................................................................	26
8.8. Connection with Typical Microcontroller..........................................................................................	27
8.9. When used as a clock source (32 kHz-TCXO) ...............................................................................	27
9. External Dimensions / Marking Layout ..........................................................................	28
10. Application notes .........................................................................................................	30