SM8580 Nippon_Precision_Circuits America, SM8580 Datasheet - Page 13

• Manufacturer Part Number: SM8580
• Description: Real-time Clock ic
• Manufacturer: Nippon_Precision_Circuits America

I
1. ±30 seconds adjust function
2. The clock stops, and the ±30 seconds adjust function operates.
3. If the timer source clock frequency is ≤ 1Hz, the timer cycle changes when the digital correction function is used.
4. If the timer source clock frequency is ≤ 1Hz, the timer cycle changes.
5. If the timer source clock frequency is ≤ 1Hz, the timer is stopped.
6. An alarm interrupt is not generated by the 30-second adjust function (ADJ) even if all other alarm conditions are met.
7. If the FOUT source clock frequency is ≤ 1Hz, the cycle changes when the digital correction function is used.
8. If the FOUT source clock frequency is ≤ 1Hz, the cycle changes.
9. If the FOUT source clock frequency is ≤ 1Hz, the timer is stopped.
Function operation table
If the timer source clock frequency is ≥ 64Hz, the timer cycle is not affected when the digital correction function is used.
If the timer source clock frequency is ≥ 64Hz, the timer cycle does not change.
If the timer source clock frequency is ≥ 64Hz, the timer operates.
However, an alarm interrupt is generated 1 second later if the alarm conditions are still met.
If the FOUT source clock frequency is ≥ 32Hz, the cycle is not affected when the digital correction function is used.
If the FOUT source clock frequency is ≥ 32Hz, the cycle does not change.
If the FOUT source clock frequency is ≥ 32Hz, the timer operates.
STOP
0
0
1
1
Bit
ADJ
0
1
0
1
Stopped/adjust
Operating
Stopped
Adjust
Clock
1
SM8580AM
2
Operating/stopped
Operating/stopped
Operating
Operating
Timer
3
4
Function
5
5
NIPPON PRECISION CIRCUITS INC.—13
Operating
Operating
Stopped
Stopped
Alarm
6
Operating/stopped
Operating/stopped
Operating
Operating
FOUT
7
8
9
9