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參數(shù)資料
| 型號(hào)： | MSM5547RS |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDIP42 |
| 封裝： | 0.600 INCH, 2.54 MM PITCH, PLASTIC, DIP-42 |
| 文件頁數(shù)： | 8/11頁 |
| 文件大?。?/td> | 113K |
| 代理商： | MSM5547RS |
6/10
Semiconductor
MSM5547
Time Correction
Hour-minute fast-forward function
Hour or minute can be fast-forwarded individually. The HS (hours set) pin fast-forwards the
hour digit and the MS (minutes set) pin forwards the minute digit at 2 Hz.
In open status, the HS and MS pins are held to “0” level by a pull-down resistor, and are in
inactive status.
These pins become active by being set to “1” level externally.
It takes 0.242 to 0.5 sec from when the HS and MS pins become active to when +1 is counted.
After a +1 count, time is counted in 0.5 sec (2 Hz) units.
Hour digit and minute digits can be fast-forwarded in parallel.
To fast-forward hour digit, the lower counter continues normal operation but does not carry
from minute to hour digit.
For fast-forwarding minute digit, the counter does not carry to the hour digit. The second digit
continues normal operation but does not carry to the minute digit.
Time Setting Function (
±30 minutes reset to zero)
In open status, the ZA (zero adjust) pin is held to “0” level by a pull-down resistor and is in
inactive status. This pin becomes active and enables time setting by being set to “1” level
externally.
Time is set at Min. 0.00 sec to Max. 0.0312 sec after the ZA pin becomes “1” level.
For time setting, minute and second digits are reset to 00' 00". The colon output starts with “1”.
If the minute digit is less than 30, minute and second digits are reset to 00’00" . The counters
for seconds are reset up to 16 Hz.
(Example of Setting)
(X - 1) hour 30 minutes 00 seconds
X hour 00 minutes 00 seconds
X hour 00 minutes 00 seconds
X hour 29 minutes 59 seconds
X hour 30 minutes 00 seconds
X hour 59 minutes 59 seconds
X + 1 hours 00 minutes 00 seconds
(X + 1) hour 29 minutes 59 seconds
~
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