s-35399a03 Seiko Instruments Inc., s-35399a03 Datasheet - Page 25

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

Rev.1.0
INT1 pin/INT2 pin
3. Per-minute edge interrupt output
4. Minute-periodical interrupt output 1
INT1ME, INT1FE
INT2ME, INT2FE
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
Per-minute edge interrupt output is the function to output “L” from the
processing is done, after selecting the output mode. To set the pin output to “H”, turn off the output mode of per-minute
edge interrupt. In the
input “0” in INT2ME.
*1. Pin output is set to “H” by disabling the output mode within 7.9 ms, because the signal of this procedure is
The minute-periodical interrupt 1 is the function to output the one-minute clock pulse (Duty 50%) from the
pin, when the first minute-carry processing is done, after selecting the output mode.
*1. Setting the output mode disable makes the pin output “H”, while the output from the
32kE = 0, INT1AE = 0
INT2AE = 0
32kE = 0, INT1AE = Don’t care (0 or 1), INT1FE = 0
INT2AE = Don’t care (0 or 1), INT2FE = 0
INT1 pin/INT2 pin
INT1ME/INT2ME
Note that pin output is set to “L” by setting enable the output mode again.
maintained for 7.9 ms. Note that pin output is set to “L” by setting enable the output mode again.
_00
"L" is output again if this period is within 7.9 ms
Minute-carry
processing
INT
1
Figure 28 Timing of Minute-periodical Interrupt Output 1
"L" is output again if this period is within 7.9 ms
Figure 27 Timing of Per-Minute Edge Interrupt Output
pin output mode, input “0” in INT1ME in the status register 2. In the
Change by program (OFF)
30 s
"H" is output again if this period is within 7.9 ms.
"L" is output at the next minute-carry processing
Minute-carry processing
Minute-carry
processing
30 s
Seiko Instruments Inc.
30 s
Change by program
Minute-carry
30 s
processing
*1
.
OFF
30 s
Minute-carry
*1
Minute-carry
processing
INT /
processing
30 s
.
2-WIRE REAL-TIME CLOCK
1
INT
30 s
2
pin, when the first minute-carry
Minute-carry
30 s
processing
INT
INT
1
/
2
INT
S-35399A03
30 s
pin output mode,
2
pin is in “L”.
INT /
1
INT
25
2