参数资料
| 型号： | PT7C43390WEX |
| 厂商： | Pericom |
| 文件页数： | 22/23页 |
| 文件大小： | 0K |
| 描述： | IC REAL TIME CLOCK 8SOIC |
| 标准包装： | 1 |
| 类型： | 时钟/日历 |
| 特点： | 警报器，闰年，方波输出 |
| 时间格式： | HH:MM:SS（12/24 小时） |
| 数据格式： | YY-MM-DD-dd |
| 接口： | I²C，2 线串口 |
| 电源电压： | 1.3 V ~ 5.5 V |
| 电压 - 电源，电池： | 1.1 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 标准包装 |
| 其它名称： | PT7C43390WEXDKR |
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PT0280(08/09)
Ver: 3
8
Data Sheet
PT7C43390
2-Wire Real-time Clock Module
INT1 register_1
INT1 register_2
In INT1 register_1, A1WE, A1HE, and A1mE are respectively in the MSB of each byte. By setting each bit to “1”, the setting of
the day of week data, hour data, and minute data in the corresponding byte becomes valid. A2WE, A2HE, and A2mE of INT1
register_2 are the same.
The example of setting
In case of the setting alarm time “PM 7:00” in INT1 register_1
a) 12-hour expression (status register_1 B1 = 0)
: set up 7:00 PM
Writing in INT1 register_1
Day of week data
0
__*1
Hour data
1
0
1
Minute data
1
0
1
MSB
LSB
*1. Don’t care (Both of 0 and 1 are acceptable).
b) 24-hour expression (status register_1 B1 = 1)
: set up 19:00 PM
Writing in INT1 register_1
Day of week data
0
__*1
Hour data
1
1*2
0
1
0
1
Minute data
1
0
MSB
LSB
*1. Don’t care (Both of 0 and 1 are acceptable).
*2. Set up AM/PM flag along with the time setting.
2)
Selected frequency steady interrupt
Data set in INT1 register_1 and INT1 register_2 is considered as frequency duty data. By setting each bit from B4 to B0 of the
register to “1”, the frequency corresponding to each bit is selected in an ANDed form. The SC bits configure a 3-bit SRAM type
register that can be set freely by users. These bits can be read and written within the operating voltage range (1.3 to 5.5 V). There
is no impact on the duty function.
R/W: Read/Write-enabled
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