参数资料
| 型号： | PT7C43390WEX |
| 厂商： | Pericom |
| 文件页数： | 21/23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
7
Data Sheet
PT7C43390
2-Wire Real-time Clock Module
B7: TEST
The TEST flag is a bit for testing the IC. If the TEST flag is set to “1”, the IC is switched to the TEST mode. If this flag
is “1”, it is necessary to initialize it to “0” by setting the reset flag of status register_1 to “1”.
B5, B4: SC
These flags configure a 2-bit SRAM type register that can be freely set by users. They are read and written within the
operating voltage range (1.3 to 5.5 V).
B6: INT2AE, B5: INT2ME, B4: INT2FE
These flags are used to select the output mode from the INT2 pin. Mode selections are shown below. When using the
alarm 2 function, after setting the alarm interrupt mode, access INT1 register_2.
Interrupt Modes (INT2)
INT2AE
INT2ME
INT2FE
INT2 Pin Output Mode
0
No interrupt
*1
0
1
Selected frequency steady interrupt
*1
1
0
Per-minute edge interrupt
*1
1
Per-minute steady interrupt 1 (50% duty)
1
0
Alarm interrupt
*1. Don’t care (Both of 0 and 1 are acceptable).
B3: 32kE, B2: INT1AE, B1: INT1ME, B0: INT1FE
These flags are used to select the output mode from the INT1 pin. Mode selections are shown below. When using the alarm 1
function, after setting the alarm interrupt mode, access INT1 register_1.
Interrupt Modes (INT1)
32kE
INT1AE
INT1ME
INT1FE
INT1 Pin Output Mode
0
No interrupt
1
*1
32 kHz output
0
*1
0
1
Selected frequency steady interrupt
0
*1
1
0
Per-minute edge interrupt
0
1
Per-minute steady interrupt 1 (50% duty)
0
1
0
Alarm interrupt
0
1
Per-minute steady interrupt 2
*1. Don’t care (Both of 0 and 1 are acceptable).
4.
INT1 register_1 and INT1 register_2
INT1 register_1 and INT1 register_2 are interrupt setting registers that can be set independently. The interrupts are output from
the INT1 pin and INT2 pin. The function is switched by using status register_2.
1)
Alarm interrupt
Data set in INT1 register_1 and INT1 register_2 is considered as alarm time data. Having the same configuration as the hour and
minute registers of the real-time data register, these registers represent hours and minutes with BCD codes. When setting these
registers, do not set any nonexistent day. Data to be set must be in accordance with the 12-hour or 24-hour expression that is set in
status register_1.
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