參數(shù)資料
型號: M41ST95WMX6
廠商: STMICROELECTRONICS
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 1 TIMER(S), REAL TIME CLOCK, PDSO28
封裝: 0.300 INCH, PLASTIC, SOIC-28
文件頁數(shù): 10/35頁
文件大?。?/td> 735K
代理商: M41ST95WMX6
Obsolete
Product(s)
- Obsolete
Product(s)
M41ST95Y*, M41ST95W
18/35
To disable the alarm, write '0' to the Alarm Date
Register and to RPT1-5. The IRQ/FT/OUT output
is cleared by a READ to the Flags Register as
shown in Figure 14. A subsequent READ of the
Flags Register is necessary to see that the value
of the Alarm Flag has been reset to '0.'
The IRQ/FT/OUT pin can also be activated in the
battery back-up mode. The IRQ/FT/OUT will go
low if an alarm occurs and both ABE (Alarm in Bat-
tery Back-up Mode Enable) and AFE are set.
The ABE and AFE Bits are reset during power-up,
therefore an alarm generated during power-up will
only set AF. The user can read the Flag Register
at system boot-up to determine if an alarm was
generated while the M41ST95Y/W was in the de-
select mode during power-up. Figure 15., page 19
illustrates the back-up mode alarm timing.
Figure 14. Alarm Interrupt Reset Waveform
Table 5. Alarm Repeat Mode
RPT5
RPT4
RPT3
RPT2
RPT1
Alarm Setting
1
1111
Once per Second
1
1110
Once per Minute
1
1100
Once per Hour
1
1000
Once per Day
1
0000
Once per Month
0
0000
Once per Year
AI03664
IRQ/FT/OUT
ACTIVE FLAG
0Fh
0Eh
10h
HIGH-Z
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