參數(shù)資料
型號(hào)： LM64
廠(chǎng)商： National Semiconductor Corporation
元件分類(lèi)： 溫度/濕度傳感器
英文描述： 【1∑C Remote Diode Temperature Sensor with PWM Fan Control and 5 GPIO’s
中文描述： 【1ΣC遠(yuǎn)程二極管溫度傳感器，PWM風(fēng)扇控制和5個(gè)GPIO的
文件頁(yè)數(shù)： 13/29頁(yè)
文件大?。?/td> 363K
代理商： LM64
1.0 Functional Description
(Continued)
The data byte has the Most Significant Bit (MSB) first. At the
end of a read, the LM64 can accept either Acknowledge or
No-Acknowledge from the Master. Note that the No-
Acknowledge is typically used as a signal for the slave
indicating that the Master has read its last byte.
1.9 DIGITAL FILTER
The LM64 incorporates a user-configured digital filter to
suppress erroneous Remote Temperature readings due to
noise. The filter is accessed in the Remote Diode Tempera-
ture Filter and Comparator Mode Register. The filter can be
set according to the following table.
Level 2 is maximum filtering.
Digital Filter Selection Table
D2
0
0
1
1
D1
0
1
0
1
Filter
No Filter
Level 1
Level 1
Level 2
20065510
FIGURE 7. Step Response of the Digital Filter
20065511
FIGURE 8. Impulse Response of the Digital Filter
20065512
FIGURE 9. Digital Filter Response in an Intel Pentium 4
processor System. The Filter on and off curves were
purposely offset to better show noise performance.
L
www.national.com
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