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参数资料
| 型号： | M41T81M6E |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| 封装： | 0.150 INCH, LEAD FREE, PLASTIC, SOIC-8 |
| 文件页数： | 11/29页 |
| 文件大小： | 454K |
| 代理商： | M41T81M6E |
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M41T81
Clock operation
Doc ID 7529 Rev 10
3.8
Output driver pin
When the FT bit, AFE bit, SQWE bit, and watchdog register are not set, the
IRQ/FT/OUT/SQW pin becomes an output driver that reflects the contents of D7 of the
control register. In other words, when D7 (OUT bit) and D6 (FT bit) of address location 08h
are a '0,' then the IRQ/FT/OUT/SQW pin will be driven low.
Note:
The IRQ/FT/OUT/SQW pin is an open drain which requires an external pull-up resistor.
3.9
Preferred initial power-on default
Upon initial application of power to the device, the following register bits are set to a '0' state:
watchdog register; AFE; ABE; SQWE; and FT. The following bits are set to a '1' state: ST;
OUT; and HT (see Table 5).
Table 5.
Preferred default values
Condition
ST
HT
OUT
FT
AFE
SQWE
ABE
Watchdog
register(1)
1.
BMB0-BMB4, RB0, RB1.
Initial power-up(2)
2.
State of other control bits undefined.
11
10
0
Subsequent power-up (with
battery backup)(3)
3.
UC = unchanged
UC
1
UC
0
UC
0
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相关代理商/技术参数 |
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