Epson RX8111CE - Page 56

RX8111CE
Page − 52
ETM61E-01
3) Initialization Ex2 (only clock usage)
Finish
•Writes Time and Date.
•Clear STOP bit to “0”.
Start
•Setup the Battery switchover function.
•Set STOP bit to 1.
•Clear all all interruption enable bit.
•Reset all status flags.
•Specify basic timing for each of functions.
Reg − 32h
Reg − 1Dh
Reg − 1Eh
Reg − 10h − 16h
Reg − 1Fh
Reg − 1Fh
Figure 40 Example flow (Initialization Ex2 only clock usage)
4) Setup Clock and calendar example
Next processing
Setup of Time an date.
STOP  " 1 "
• Preventing time update in time setting by setting STOP bit to”1”.
Writing present time
• Writing information [year/month/day/week/hour/minute/second] which is
necessary to change.
In case of initialization, initialize all data.
STOP  " 0 "
• Resetting STOP bit to “0” and clock starts.
The clock starts just after resetting to “0”.
• If user does not use STOP bit operation, be aware that clock start just after
writing [second] data. Also if user write second ~ year at once, I
2
C bus
acknowledge reset second and less than second counters and clock
starts.
Be aware that battery backup switchover function is inactive during STOP
bit is set to “1”.
Figure 41 Example flow (Setting clock, calendar)
5) Reading clock, calendar example
Next processing
Reading clock, calendar
Current time reading
• Complete reading access within 0.95 sec.
The reading access should be done while STOP bit is “0”.
(Setting STOP bit to “1” may cause time delay.)
• As for reading of time and calendar, sequential access is
recommended by auto address increment.
Figure 42 Example flow (Reading clock, calendar)