s-35199a01 Seiko Instruments Inc., s-35199a01 Datasheet - Page 27

• Manufacturer Part Number: s-35199a01
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

Rev.1.0
*1. If Users clear INT1AE/INT2AE once; “L” is not output from the INT pin by setting INT1AE/INT2AE enable again,
These are selectable for the INT pin output mode;
Alarm 1 interrupt, alarm 2 interrupt, the output of user-set frequency, per-minute edge interrupt output, minute-periodical
interrupt output 1 and 2, 32.768 kHz output.
In alarm 1 interrupt/output of frequency; set data in the INT register 1. In alarm 2 interrupt, set data in the INT register 2. To
swith the output mode, use the status register 2. Refer to “ 3. status register 2 ” in “ Configuration of Register ”.
When switching the output mode, be careful of the output status of the pin. Especially, when using alarm interrupt/output of
frequency, switch the output mode after setting “00h” in the INT register 1 or 2. Alarm 2 interrupt is dependent from other
modes. Regardless of other settings of mode if alarm 2 interrupt was generated, be careful that “L” is output from the INT
pin. In 32.768 kHz output/per-minute edge interrupt output/minute-periodical interrupt output, it is unnecessary to set data
in the INT register 1 or 2 for users.
Refer to the followings regarding each operation of output modes.
1. Alarm interrupt output
INT Pin Output Mode
Alarm interrupt output is the function to output “L” from the INT pin, at the alarm time which is set by user has come. If
setting the pin output to “H”, turn off the alarm function by setting “0” in INT1AE/INT2AE in the status register 2.
To set the alarm time, set the data of day of the week, hour, minute in the INT register 1 or 2, set the data of year, month,
day in the alarm expansion register 1 or 2. Refer to “4. INT register 1 and INT register 2” and “9. Alarm expansion
register 1 and alarm expansion register 2” in “ Configuration of Register” .
Alarm setting of “Y (year), M (month), D (day), W (day of week), H (hour), m (minute)”
within a period when the alarm time matches real-time data.
_00
INT1AE/INT2AE
Y (year), M (month), D (day), W (day of week)
Real-time data
INT pin
Status register 2 setting
• Alarm 1 interrupt
• Alarm 2 interrupt
Change by program
32kE = 0, INT1ME = INT1FE = 0
None
H h (m − 1) m 59 s
Alarm time matches
Second
Real-time data
Figure 31 Alarm Interrupt Output Timing (1/2)
Minute
mx
INT register 1
INT register 2
Seiko Instruments Inc.
Hour Week
Hx
H h 00m 00 s
Change by program
Period when alarm time matches
Wx
Comparator
OFF
Alarm expansion register 1
Alarm expansion register 2
Day
Dx
01 s
INT register x alarm enable flag
• AxHE = AxmE = AxWE = "1"
Alarm expansion register x alarm enable flag
• AxYE = AxME = AxDE = "1"
Month
Mx
Change by program
Year
Yx
*1
3-WIRE REAL-TIME CLOCK
59 s
Alarm interrupt
H h (m + 1) m 00 s
S-35199A01
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