參數(shù)資料
型號: 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
文件頁數(shù): 6/56頁
文件大?。?/td> 529K
代理商: S-35390A-J8T1G
2-WIRE REAL-TIME CLOCK
S-35390A
Rev.3.0_00
Seiko Instruments Inc.
14
4.
INT1 register and INT2 register
The INT1 and INT2 registers are to set up the output of user-set frequency, or to set up alarm interrupt. Users are able to
switch the output mode by using the status register 2. If selecting to use the output mode for alarm interrupt by status
register 2; these registers work as alarm-time data registers. If selecting the output of user-set frequency by status
register 2; these registers work as data registers to set the frequency for clock output. From each INT1
and INT2 pin,
a clock pulse and alarm interrupt are output.
(1)
Alarm interrupt
Users can set the alarm time (the data of day of the week, hour, minute) by using the INT1 and INT2 registers which
are 3-byte data registers. The configuration of register is as well as the data register of day of the week, hour, minute,
in the real-time data register; is expressed by the BCD code. Do not set a nonexistent day. Users are necessary to
set up the alarm-time data according to the 12/24 hour expression that they set by using the status register 1.
H8
H4
H2
H1
A1mE
m8
m4
m2
m1
H20
H10
m10 m20 m40
H8
H4
H2
H1
A2mE
m8
m4
m2
m1
H20
H10
m10 m20 m40
AM /
PM
A1WE
0
W4
W2
W1
B7
B0
0
INT1 register
0
W4
W2
0
INT2 register
A2WE
A1HE
A2HE
AM /
PM
B7
B0
B7
B0
B7
B0
B7
B0
B7
B0
0
Figure 14
INT1 Register and INT2 Register (Alarm-Time Data)
The INT1 register has A1WE, A1HE, A1mE at B0 in each byte. It is possible to make data valid; the data of day of
the week, hour, minute which are in the corresponded byte; by setting these bits to “1”. This is as well in A2WE,
A2HE, A2mE in the INT2 register.
Setting example: alarm time “7:00 pm” in the INT1 register
(a) 12-hour expression (status register 1
B6 = 0)
set up 7:00 PM
Data written to INT1 register
Day of the week
*1
0
Hour
1
0
1
Minute
0
1
B7
B0
*1.
Don’t care (Both of 0 and 1 are acceptable).
(b) 24-hour expression (status register 1
B6 = 1)
set up 19:00 PM
Data written to INT1 register
Day of the week
*1
0
Hour
1
0
1
0
1
*2
1
Minute
0
1
B7
B0
*1.
Don’t care (Both of 0 and 1 are acceptable).
*2.
Set up the
PM
AM /
flag along with the time setting.
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