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參數(shù)資料
| 型號(hào)： | MSM6542-01MS-K |
| 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, PDSO20 |
| 封裝： | 0.250 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 35/54頁 |
| 文件大?。?/td> | 406K |
| 代理商： | MSM6542-01MS-K |
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Semiconductor
MSM6542-01/02/03
107
[Power on sequence when DP is 1]
Apply 5V
Read CC' register
DP = 1 ?
CE' register
DP ← 0
CE' register
DP ← 1
Idling for at least 11ms
Read C ' register
E
Read CE' register
Check contents of
individual registers
DP = 0 ?
CE' register
DP ← 1
Standby
Unclear
What status before
5V is applied?
CE' register
DP ← 1
Are connents of
individual register
correct?
Does operator
determine that the
current time is
is correct?
Idling fore at least 11ms
Check that DP is 0
Idling for 125 s
Set individual
registers
CE register
REST ← 0
Check that DP is 1
N
Y
*3
N
*5
Y
No
*3
Yes
No
*4
(CS1
)
VDD = 0V
*1
CE register
REST ← 1
CE' register
DP ← 1
*1 The test bit is cleared.
*2 It takes 9 to 11 ms from when
0 is written in the DP bit to
when it is set at 0 in the IC. If
0 is written unintentionally in
the DP bit during application
of 5V power, it may be set at 0.
To prevent this, first set the
DP bit at 0 then at 1. When the
voltage before 5V is applied is
0V, this loop takes the time
equal to the one required to
start oscillation. Usually, it
takes 0.5 to 2 s.
*3 Time until the DP bit becomes
0 under assumption that os-
cillation is in progress.
*4 The contents of R-S1, to R-
Y10 and R-W must be pos-
sible values and the values of
the other registers must be as
expected.
*5 Wait time until a carry, which
may be generated, is com-
pleted.
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