S-35199A01 Datasheet, PDF (28/54 Pages) Seiko Instruments Inc – 3-WIRE REAL-TIME CLOCK

3-WIRE REAL-TIME CLOCK
S-35199A01
Alarm setting of “H (hour)”
Status register 2 setting
• Alarm 1 interrupt
32kE = 0, INT1ME = INT1FE = 0
• Alarm 2 interrupt
None
INT register 1
INT register 2
INT register x alarm enable flag
• AxHE = AxmE = AxWE = "1"
Alarm expansion register x alarm enable flag
• AxYE = AxME = AxDE = "1"
Alarm expansion register 1
Alarm expansion register 2
mx Hx Wx Dx Mx Yx
Rev.1.0_00
Comparator
Alarm interrupt
Second Minute Hour Week Day Month Year
Real-time data
Y (year), M (month), D (day), W (day of week)
Real-time data (H − 1) h 59 m 59 s H h 00 m 00 s 01 s
Change by program
Change by program
59 s H h 01 m 00 s
H h 59 m 59 s (H + 1) h 00 m 00 s
Change by program
Change by program
INT1AE/INT2AE
INT pin
*1
Alarm time matches
OFF
Period when alarm time matches
Alarm time
matches^*2
*1
OFF
*1. If Users clear INT1AE/INT2AE once; “L” is not output from the INT pin by setting INT1AE/INT2AE enable
again, within a period when the alarm time matches real-time data.
*2. If turning the alarm output on by changing the program, within the period when the alarm time matches
real-time data, “L” is output again from the INT pin when the minute is counted up.
Figure 32 Output Timing of Alarm Interrupt (2/2)
2. Output of user-set frequency
The output of user-set frequency is the function to output the frequency which is selected by using data, from the INT pin,
in the AND-form. Set up the data of frequency in the INT register 1.
Refer to “4. INT register 1 and INT register 2” in “„ Configuration of Register”.
Status register 2 setting
32kE = 0, INT1AE = Don’t care (0 or 1), INT1ME = 0
Change by program
INT1FE
Free-run output starts
OFF
INT pin
Figure 33 Output Timing of User-set Frequency
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Seiko Instruments Inc.