參數(shù)資料
型號(hào)： S-35390A-J8T1G
元件分類： 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取
英文描述： 1 TIMER(S), REAL TIME CLOCK, PDSO8
封裝： LEAD FREE, SOP-8
文件頁(yè)數(shù)： 14/56頁(yè)
文件大?。?/td> 529K
代理商： S-35390A-J8T1G
2-WIRE REAL-TIME CLOCK
Rev.3.0_00
S-35390A
Seiko Instruments Inc.
21
1
INT
Pin and
2
INT
Pin Output Mode
These are selectable for the output mode for
1
INT
and
2
INT
pins;
Alarm interrupt, the output of user-set frequency, per-minute edge interrupt output, minute-periodical interrupt output 1. In
the
1
INT
pin output mode, in addition to the above modes, minute-periodical interrupt output 2 and 32.768 kHz output
are also selectable.
To switch the output mode, use the status register 2. Refer to “3. Status register 2” in “
Configuration of Register”.
When switching the output mode, be careful of the output status of the pin. Especially, when using alarm interrupt/output
of frequency, switch the output mode after setting “00h” in the INT1/INT2 register. In 32.768 kHz output/per-minute edge
interrupt output/minute-periodical interrupt output, it is unnecessary to set data in the INT1/INT2 register for users.
Refer to the followings regarding each operation of output modes.
1.
Alarm interrupt output
Alarm interrupt output is the function to output “L” from the
1
INT /
2
INT
pin, at the alarm time which is set by user has
come. If setting the pin output to “H”, turn off the alarm function by setting “0” in INT1AE/INT2AE in the status register 2.
To set the alarm time, set the data of day of the week, hour and minute in the INT1/INT2 register. Refer to “4. INT1
register and INT2 register” in “
Configuration of Register”.
Alarm setting of W (day of the week), H (hour), m (minute)”
OFF
*1
INT1AE/INT2AE
mx
Comparator
Hx
Wx
INTx register alarm enable flag
AxHE = AxmE = AxWE = "1"
Status register 2 setting
INT1 pin output mode
32kE = 0, INT1ME = INT1FE = 0
INT2 pin output mode
INT2ME = INT2FE = 0
INT1 register
INT2 register
Alarm interrupt
Second Minute
Year
Day of
the week
Day
Month
Real-time data
W (day of the week)
01 s
59 s
INT1 pin/INT2 pin
Change by program
Alarm time matches
Period when alarm time matches
Change by program
H h 00 m 00 s
H h (m
1) m 59 s
H h (m + 1) m 00 s
Change by program
Real-time data
Hour
*1. If users clear INT1AE/INT2AE once; “L” is not output from the
1
INT
/
2
INT
pin by setting INT1AE/INT2AE enable
again, within a period when the alarm time matches real-time data.
Figure 24
Alarm Interrupt Output Timing (1/2)
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