參數(shù)資料
型號(hào)： M34519E8FP
元件分類(lèi)： 微控制器/微處理器
英文描述： 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDSO42
封裝： 0.450 INCH, 0.80 MM PITCH, PLASTIC, SSOP-42
文件頁(yè)數(shù)： 30/50頁(yè)
文件大?。?/td> 1808K
代理商： M34519E8FP
36
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
KEY_n_NTHR: the negative threshold for key n (where n is 0–10).
The negative threshold determines how much the signal must fall (compared to the reference)
before a key is considered to be “In Detect”. This level will generally need to be tuned
individually for each key. To disable an individual key, set the threshold for that key to 0.
KEY_n_NHYST: the negative hysteresis applied to key n detection threshold (where n is
0 – 10).
Negative Hysteresis operates as a “modifier” for the negative threshold in order to provide a
greater degree of control over the detection of a “Touch”. When a key signal is first detected as
being under the negative threshold, the threshold is reduced by a factor corresponding to the
selected negative hysteresis. This means that the key will not go in and out of detection when
the signal is on the borderline between drift-compensation or touch detection.
The settings for negative hysteresis are:
00
No change to negative threshold
01
12.5% reduction in negative threshold
10
25% reduction in negative threshold
11
37.5% reduction in negative threshold
Default KEY_n_NTHR value:
10 counts
Default KEY_n_NHYST value:
2 (25 percent)
25
KEY_6_NTHR
KEY_6_NHSYT
26
KEY_7_NTHR
KEY_7_NHSYT
27
KEY_8_NTHR
KEY_8_NHSYT
28
KEY_9_NTHR
KEY_9_NHSYT
29
KEY_10_NTHR
KEY_10_NHSYT
Table 7-15.
Negative Threshold/Negative Hysteresis (Continued)
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
相關(guān)PDF資料
PDF描述
M34519M8-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PDSO42
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