s-35399a03 Seiko Instruments Inc., s-35399a03 Datasheet - Page 24

• Manufacturer Part Number: s-35399a03
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

24
INT1 pin/INT2 pin
2-WIRE REAL-TIME CLOCK
S-35399A03
INT1AE/INT2AE
Real-time data
*1. If users clear INT1AE/INT2AE once; “L” is not output from the
*2. If turning the alarm output on by changing the program, within the period when the alarm time matches
2. Output of user-set frequency
INT1 pin/INT2 pin
Alarm setting of “H (hour)”
The output of user-set frequency is the function to output the frequency which is selected by using data, from the
Refer to “4. INT1 register and INT2 register” in “ Configuration of Register” .
INT /
INT1FE/INT2FE
real-time data, “L” is output again from the
enable again, within a period when the alarm time matches real-time data.
1
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
INT
32kE = 0, INT1AE = Don’t care (0 or 1), INT1ME = 0
INT2AE = Don’t care (0 or 1), INT2ME = 0
2
Change by program
pin, in the AND-form. Set up the data of frequency in the INT1/INT2 register.
(H − 1) h 59 m 59 s
Alarm time matches
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
Free-run output starts
32kE = 0, INT1ME = INT1FE = 0
INT2ME = INT2FE = 0
Second
Figure 26 Output Timing of User-set Frequency
Figure 25 Alarm Interrupt Output Timing (2/2)
H h 00 m 00 s
Real-time data
Minute
mx
Change by program
INT1 register
INT2 register
OFF
Hour Week
Hx
Seiko Instruments Inc.
01 s
INT /
Comparator
Wx
Period when alarm time matches
1
Alarm expansion register 1
Alarm expansion register 2
INT
Day
Dx
Change by program
2
*1
INTx register alarm enable flag
• AxHE = AxmE = AxWE = "1"
Alarm expansion register x alarm enable flag
• AxYE = AxME = AxDE = "1"
pin when the minute is counted up.
Month
59 s
Mx
H h 01 m 00 s
Year
Yx
Alarm time
matches
INT /
Change by program
*2
1
Alarm interrupt
INT
Change by program
2
OFF
OFF
pin by setting INT1AE/INT2AE
H h 59 m 59 s
*1
(H + 1) h 00 m 00 s
Rev.1.0
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