S-35390A Seiko Instruments, S-35390A Datasheet - Page 20

• Manufacturer Part Number: S-35390A
• Description: 2-Wire Real Time Clock
• Manufacturer: Seiko Instruments

20
2-WIRE REAL-TIME CLOCK
S-35390A
INT1 pin / INT2 pin
INT1AE / INT2AE
(2) Selected frequency steady interrupt output
Real time data
*1. Once it clears, even if it enables again within a coincidence period, “L” will not be output from an
*2. When an alarm output is turned on by change by the program within a coincidence period, “L” is
32kE = 0, INT1ME = 0, INT1AE = Don’t care (0 or 1)
INT2ME = 0, INT2AE = Don’t care (0 or 1)
INT1 pin/
INT2 pin
When the INT1 (or INT2) pin output mode is set as the selected frequency steady interrupt setting
using status register_2 and the frequency/duty data is set in INT1 register_1 (or INT1 register_2), the
set clock is output.
INT1FE/
INT2FE
again output from an INT pin at the time of change of the following part.
INT pin (or
1
Change by the program
INT
(H − 1) h 59 m 59 s
Figure 18 Timing of Selected Frequency Steady Interrupt Output
2
Alarm time match
pin).
Second
32kE = 0, INT1ME = INT1FE = 0
(INT1 pin output mode)
INT2ME = INT2FE = 0
(INT2 pin output mode)
Alarm enable flag
In case of AxWE = AxmE = “0”, AxHE = “1”
Free-run output starts
Figure 17 Timing of Alarm Interrupt Output
Minute
INT1 register_1 / INT1 register_2
mx Hx Wx
Comparator
Real time data
H h 00 m 0 s
Change by the program
Seiko Instruments Inc.
Hour
OFF
Week
01 s
When set “H” hour
Change by the program
Alarm interrupt
Day
Alarm time match period
*1
59 s
Change by program
Month
Alarm
time match
H h 01 m 00 s
*2
Year
OFF
Change by the program
OFF
H h 59 m 59 s
*1
(H + 1) h 00 m 00 s
Rev.1.2
_00