Epson RX8900SA/CE - 2) Method of Initialization after Starting of Internal Oscillation

RX8900 SA / CE
Page - 34 ETM45E-01
2) Method of initialization after starting of internal oscillation
The Initialize is possible in 30ms since Internal VDD becomes higher than bottom value of clock supply voltage.
Even in this case, after an internal oscillation begins, it is necessary to clear VLF= “0”.
When an internal oscillation starts, 0 writing of VLF is approved.
Start-up complete
power on
Wait
 Wait time of 30ms is necessary at least
Whether it is a return from the state of the backup is confirmed.
VLF=1 ?
YES
YES
NO
VLF=”0” clear
Wait
VLF=0 ?
Software reset
& Initialize
NO
Please set waiting time depending on load of a system optionally