Epson RX8130CE - Flow-Chart; Initializing Example

18. Flow-chart
RX8130CE Jump to Top / Bottom
ETM50E-07 Seiko Epson Corporation 53
18. Flow-chart
The following flow-chart is one example, but it is not necessarily applicable for every use-case and not necessarily the
most effective process for individual applications.
18.1 Initializing example
Start
Wait > 30 ms
VLF=1 ?
YES
YES
NO
VLF=0 clear
Wait
VLF=0 ?
Software reset
NO
Power on
Finish startup
Dummy-read
Initializing
Figure 39 Example flow (Power initialization)
• At least 30 ms wait time is needed. So that it is stable RTC.
40 ms is not oscillation startup time
•When the power supply conditions for which Power-On
Reset is executed cannot be satisfied, then must be execute
a Dummy-read.
Dummy read is one time read access to a free address
Ignore ACK / NACK from RX8130CE in Dummy-read.
Judge RX8130CE returned from backup normally, or fail.
When the power conditions for which the power-on reset is
executed are not satisfied, execute a software reset.
For [Software Reset], start from "4) of "18.2 Software Reset."
VLF cannot be cleared to 0 until internal oscillation starts.•
Set any waiting time.
Set the maximum number of loops, for an trouble of crystal
oscillation