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參數(shù)資料
| 型號： | S-3531A |
| 廠商： | Seiko Instruments Inc. |
| 英文描述： | CMOS Real-Time Clock IC Supporting an IIC-Bus(支持IIC-BUS的CMOS實時時鐘芯片) |
| 中文描述： | CMOS實時時鐘IC支持一個IIC總線（支持IIC總線的實時時鐘芯片的CMOS） |
| 文件頁數(shù)： | 10/31頁 |
| 文件大小： | 185K |
| 代理商： | S-3531A |
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REAL-TIME CLOCK
S-3531A
Seiko Instruments Inc.
9
2-2. Status register
The status register is an eight-bit register which allows you to display and set various modes. The POWER flag
is read-only and others are read/write-enabled.
B7
LSB
POWER 12/24
R
R/W
R/W
R/W
R/W
R/W
R/W
R/W
INT1AE
INT1ME
MSB
B6
B5
B4
B3
B2
B1
B0
INT1FE
Figure 10 Status register
B7:POWER
This flag turns to "1" if the power voltage detecting circuit operates during power-on or changes
in power voltage (below VDET). Once turning to "1," this flag does not turns back to "0" even
when the power voltage reaches or exceeds the detected voltage. When the flag is "1," you
must send the reset command and turn it to "0." It is a read-only flag.
B6:12/24
This flag is used to set 12-hour or 24-hour expression.
0 : 12-hour expression
1 : 24-hour expression
B5:INT1AE
This flag is used to choose the state of INT1 terminal output with interrupt output set. Enable
this flag after setting alarm time that forms a meeting condition in the INT1 register:
0 : Alarm interrupt output is disabled.
1 : Alarm interrupt output is enabled.
B3:INT1ME
This flag is used to make the output of the INT1 terminal per-minute edge interrupt or per-minute
steady interrupt. To make the output per-minute steady interrupt, set "1" at INT1ME and INT1FE
.
0 : Alarm interrupt or selected frequency steady interrupt output
1 : Per-minute edge interrupt or per-minute steady interrupt output
B1:INT1FE
This flag is used to make the output of the INT1 terminal per-minute steady interrupt output (a
period of one minute, 50% of duty) or selected frequency steady interrupt. Note that the INT1
register is considered as the data of frequency/duty if selected frequency steady interrupt is
chosen.
0 : Alarm interrupt or selected frequency steady interrupt output
1 : Per-minute edge interrupt or per-minute steady interrupt output
B4,B2,B0:
*
Non-used bits; They are ignored during the data writing. Indefinite data ("0" or "1") is read
during the data reading.
*
*
*
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