s-35399a02 Seiko Instruments Inc., s-35399a02 Datasheet - Page 28

• Manufacturer Part Number: s-35399a02
• Description: 2-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

28
2-WIRE REAL-TIME CLOCK
S-35399A02
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
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
Status register 2 setting
• INT1 pin output mode
• INT2 pin output mode
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
32kE = 0, INT1AE = 0
INT2AE = 0
maintained for 7.9 ms. Note that pin output is set to “L” by setting enable the output mode again.
Note that pin output is set to “L” by setting enable the output mode again.
"L" is output again if this period is within 7.9 ms
Minute-carry
INT
processing
1
Figure 34 Timing of Minute-periodical Interrupt Output 1
"L" is output again if this period is within 7.9 ms
Figure 33 Timing of Per-Minute Edge Interrupt Output
pin output mode, input “0” in INT1ME in the status register 2. In the
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
30 s
Minute-carry
processing
Change by program (OFF)
Seiko Instruments Inc.
30 s
Change by program
30 s
*1
Minute-carry
processing
.
OFF
30 s
Minute-carry
processing
*1
INT /
30 s
.
Minute-carry
processing
1
INT
30 s
2
pin, when the first minute-carry
30 s
Minute-carry
INT
processing
INT
1
/
2
INT
30 s
pin output mode,
2
Rev.1.0
pin is in “L”.
INT /
1
_00
INT
2