Epson RX8130CE - Page 6

Table of contents
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ETM50E-07 Seiko Epson Corporation 5
14.4.2. Time update interrupt function diagram .......................................................................... 36
14.5. Oscillation stop detection function ................................................................................................ 37
14.5.1. Related registers for Oscillation stop and Voltage low detect function. .......................... 37
14.6. FOUT function .............................................................................................................................. 37
14.6.1. FOUT control register. .................................................................................................... 37
14.6.2. FOUT function Table. ..................................................................................................... 37
15 Battery backup switchover function ............................................................................. 38
15.1. Description of Battery backup switchover function ........................................................................ 38
15.2 Reference characteristics of switching elements. .......................................................................... 38
15.3 Reference characteristics of the charge current ............................................................................ 39
15.4 Re-Chargeable battery Voltage Current features ........................................................................ 39
15.5. Related register of Battery backup switchover function ................................................................ 40
15.6 Detection voltage setting................................................................................................................ 45
15.7. Power supply control .................................................................................................................... 47
15.8 Main power supply (V
DD
) voltage and operation state (INIEN bit = 1) ............................................ 48
15.9. Backup power supply (V
BAT
) voltage and a charge state .............................................................. 49
16. Reset output function ................................................................................................. 50
17. Digital offset function .................................................................................................. 51
17.1.Digital offset register ...................................................................................................................... 51
17.2. Effect of the digital offset function to other functions ..................................................................... 52
18. Flow-chart .................................................................................................................. 53
18.1 Initializing example ........................................................................................................................ 53
18.2 Software Reset .............................................................................................................................. 54
18.3 Example of Initialization routine ..................................................................................................... 55
18.4 Example of Initialization routine (only clock usage) ....................................................................... 56
18.5 The setting of the clock and calendar ............................................................................................ 56
18.6 The reading of the clock and calendar ........................................................................................... 57
18.7 Setting example of the wakeup timer interrupt function ................................................................. 57
18.8 Setting example of the Alarm interrupt function ............................................................................. 58
19 Serial communication .................................................................................................. 59
19.1 Overview of I
2
C-Bus Interface ........................................................................................................ 59
19.2 Data transfers ................................................................................................................................ 59
19.3 Starting and stopping I
2
C-Bus communications ............................................................................. 59
19.4 Slave address ................................................................................................................................ 59
19.5 System configuration ..................................................................................................................... 60
19.6 I
2
C-Bus protocol ............................................................................................................................. 61
20 Circuit Diagram connection ......................................................................................... 63
20.1 Typical MCU connection ................................................................................................................ 63
20.2 32.768 kHz oscillator application connection ............................................................................... 64
21. Tables ........................................................................................................................ 65
22. Figures ....................................................................................................................... 66
Contacts .......................................................................................................................... 68