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参数资料
| 型号： | AT42QT1111-AU |
| 厂商： | ATMEL CORP |
| 元件分类： | 速度传感器和接近开关 |
| 英文描述： | PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT |
| 封装： | 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026ABA, TQFP-32 |
| 文件页数： | 30/50页 |
| 文件大小： | 637K |
| 代理商： | AT42QT1111-AU |
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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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT42QT1111-AU QS383 | 制造商:Atmel Corporation 功能描述:QTOUCH 11 KEY TOUCH SENSOR IC |
| AT42QT1111MU | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:QTouch? 11-key Sensor IC |
| AT42QT1111-MU | 功能描述:电容触摸传感器 QTouch 11 Key Touch Sensor IC RoHS:否 制造商:Microchip Technology 电源电压: 通道数量: 封装 / 箱体: 尺寸: 温度范围: |
| AT42QT1111-MU QS384 | 制造商:Atmel Corporation 功能描述:QTOUCH 11 KEY TOUCH SENSOR IC |
| AT42QT1244-AU | 功能描述:电容触摸传感器 QMatrix FMEA 24 Key Sensor IC RoHS:否 制造商:Microchip Technology 电源电压: 通道数量: 封装 / 箱体: 尺寸: 温度范围: |
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