Epson RX8804CE Applications Manual page 45

Real time clock module
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RX8804CE
2) Method of initialization after starting of internal oscillation (VLF stays "0")
power on
Wait
VLF = 1 ?
Clear VLF to 0
Wait
VLF = 0 ?
Software reset
& Initialize
Start-up complete
Figure 28 Flow ex. 2
NO
YES
NO
YES
• Wait time of 30 ms is necessary at least
• Whether it is a return from the state of the backup is confirmed
• When an internal oscillation starts, 0 writing of VLF is approved
• Please set waiting time depending on load of a system optionally
Page - 40
ETM59E-05

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