s-35190a Seiko Instruments Inc., s-35190a Datasheet - Page 24

• Manufacturer Part Number: s-35190a
• Description: 3-wire Real-time Clock
• Manufacturer: Seiko Instruments Inc.

24
3-WIRE REAL-TIME CLOCK
S-35190A
3. Per-minute edge interrupt output
4. Minute-periodical interrupt output 1
Per-minute edge interrupt output is the function to output “L” from the INT pin, when the first minute-carry processing is
done, after selecting the output mode. To set the pin output to “H”, set “0” in INT1ME in the status register 2 to turn off the
output mode of per-minute edge interrupt.
*1. Pin output is set to “H” by disabling the output mode within 7.9 ms, because the signal of this procedure is maintained
The minute-periodical interrupt 1 is the function to output the one-minute clock pulse (Duty 50%) from the INT 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 INT pin is in “L”. Note that pin
Status register 2 setting
• 32kE = 0, INT1AE = Don’t care (0 or 1), INT1FE = 0
INT1ME
INT pin
Status register 2 setting
• 32kE = 0, INT1AE = 0
INT1FE,
INT1ME
INT pin
for 7.9 ms. Note that pin output is set to “L” by setting enable the output mode again.
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
processing
"L" is output again if this period is within 7.9 ms
30 s
Minute-carry processing
Figure 30 Timing of Minute-periodical Interrupt Output 1
"H" is output again if this period is within 7.9 ms.
"L" is output at the next minute-carry processing
Figure 29 Timing of Per-Minute Edge Interrupt Output
Minute-carry
30 s
processing
Change by program (OFF)
30 s
Seiko Instruments Inc.
Change by program
30 s
Minute-carry
OFF
*1
processing
.
30 s
Minute-carry
*1
processing
.
Minute-carry
30 s
processing
30 s
30 s
Minute-carry
processing
30 s
Rev.2.4
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