MSM62X42B 데이터 시트보기 (PDF) - Oki Electric Industry
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MSM62X42B Datasheet PDF : 27 Pages
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MSM62X42B
¡ Semiconductor
(VDD)
Both pins are shorted to VDD. They should be left open or connected to 18 pin (DIP) or 24
pin (SOP).
VDD • VSS
These are a positive power supply pin VDD and a ground pin VSS.
FUNCTIONAL DESCRIPTION OF REGISTERS
Register names: S1, S10, MI1, MI10, H1, H10, D1, D10, MO1, MO10, Y1 Y10, W
a) These are abbreviations for Second1, Second10, MI nute1, MI nute10, Day1, Day10, Month1,
Month10, Year1, Year10 and week. These values are in BCD notation.
b) Refer to the Register table for details. All registers are logically positive. For example, (S8,
S4, S2, S1) = 1001 which means 9 seconds. In addition, the * mark in the rgister table is good
for either case of "1" or "0" in the case of writing and becomes “0” automatically in the case
of reading.
c) If data is written which is out of the clock register data limits, it can result in erroneous clock
data being read back. Therefore, avoid to set not existing data.
d) PM/AM h20, h10
In 12-hour mode, the time of AM12 ~ AM11 and PM12~ PM11 exists. In 24-hour mode, the
time exists from 0 hour to 23 hour.
In the mode setting of 24-hour mode, PM/AM bit is ignored, while in the mode setting of 12-
hour mode, h20 is to be set. Otherwise it causes discrepancy.
In reading out the PM/AM bit in the 24-hour mode, it is continuously read out as 0. In
reading out h20 bit in the 12-hour mode, 0 is written into this bit first, then it is continuously
read out as 0 unless 1 is being written into this bit.
e) Registers Y1, Y10 and Leap Year
This IC is designed exclusively for the Christian Era and is capable of identifying a leap year
automatically.
80, 84 88 ------- leap years
When a non-existant day of the month less than 31 day is set, for example, if the data February
29, or November 31, 1983 was written, it would be changed automatically to March 1 or
December 1, 1983 at the exact time at which a carry pulse occurs for the day's digit.
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