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參數(shù)資料
| 型號： | MSM6542-01MS-K |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 0 TIMER(S), REAL TIME CLOCK, PDSO20 |
| 封裝： | 0.250 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 16/54頁 |
| 文件大小： | 406K |
| 代理商： | MSM6542-01MS-K |
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Semiconductor
MSM6542-01/02/03
90
ii)
In the alarm pulse output mode (when the IT/PLS
2 bit is 0)
0 is written in the IRQ FLAG2 bit
with DP set at 0
Output timing
"0"
"1"
"0"
IRQ FLAG2
IRQ FLAG0
Automatic restoration
61s
c)
REST (D
2) (RESeT)
This bit resets the less-than-second counter. While the bit is 1, the counter is being reset.
When 0 is written in the bit, reset is canceled.
When CS
1 goes low, the REST bit is automatically set at 0. When 1 is written in the bit, the
TEST
1 and TEST2 bits of the CC' register are also set at 0.
d)
IRQ FLAG
0 (D3) (Interrupt ReQuest FLAG0)
This bit indicates whether the extended time zone for interrupt output is in progress when
the DP is 1. The bit is set at 1 when: (1) the D
2 (IT/PLS1) bit of the CD register is 1 (periodic
interrupt mode) or the D
3 (IT/PLS2) bit of the CD registe is 1 (alarm interrupt mode), (2) the
D
0 (DP) bit of the CE' register is 1 (data protect mode), and (3) 122 s (extended time zone)
do not elapse after a periodic interrupt or an alarm interrupt occurs. When 122
s elapse
after occurrence of such an interrupt, the bit is automatically set at 0.
The bit is not cleared when it is read. Also, data cannot be written in the bit.
C
F Register (Control F Register)
a)
READ FLAG (D
0)
This bit indicates a one-second carry. It is used to read time data.
When the READ FLAG bit is read, it is reset at 0. The status lasts until the less-than-second
realtime counter generates a carry to the one-second counter.
When a carry to the one-second realtime counter is generated, the READ FLAG bit is set at
1. The status lasts until the bit is read.
When a carry to the one-second realtime counter is generated with the READ FLAG bit set
at 1, the bit remains unchanged, i.e., at 1.
The READ FLAG bit is also set at 1 when 30-s adjustment is performed by software or
hardware. The status last until the bit is read.
For the usage of the READ FLAG bit, see "Reading registers" in reference flowcharts.
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相關代理商/技術參數(shù) |
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|---|---|
| MSM6542-02 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT |
| MSM6542-02RS | 制造商:ROHM Semiconductor 功能描述: |
| MSM6542-03 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:REAL TIME CLOCK WITH PERIODIC AND ALARM OUTPUT |
| MSM6544 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:42-DOT LCD DRIVER |
| MSM6544GS-2KR1 | 制造商:ROHM Semiconductor 功能描述: |
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