Epson RX4111CE - Page 53

14. How to use

RX4111CE Jump to Top / Bottom
ETM62E-02 Seiko Epson Corporation 52

Clock start
Reg1Fh
 Write value 00 h
 To use the STOP bit, set it to 01 h and stop counting until the time is set.
Reg10h16h
 Setting the current time
When initialization is fini
Reg1Eh
 Write value 00 h
State of VLF=1 is held even if it 0 clear until oscillation start.
When initialize it without waiting for an oscillation start, Clear VLF bit after
an oscillation
start.
Reg1Fh
Write 00h
It is unnecessary when not using the STOP bit.
Reg1Dh
 Write value 00 h
Start
Bank3, Reg2h
 Write value 04 h (when using primary battery)
When using a capacitor or a rechargeable battery not requiring charge
control Write 0C h. Adjust the setting of SMPTSEL1,0 when the power
switching is difficult with the default values 00b.
Figure 41 Flow3
3) 
Next process
Set time
STOP"1"
 
Write current time
Write information of[year/month/date[day of the week]hour:
minute: second] which is necessary to set (or reset).
In case of initialization, please initialize all data.
STOP"0"
Cancel STOP bit to 0 and start (restart) clock movement.
Clock is started when set STOP bit to 0.
It is able to set time even if not combined use of STOP bit.
 If do not use the STOP bit, RTC will start counting from the point of writing
second. Even when batch writing is performed from [seconds] to [year],
the counter below second will be reset by the acknowledge following [s],
clocking will start from that point.
 When STOP = 1, please be aware that the functions such as the voltage
detection function stop.
Figure 42 Flow4