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参数资料
| 型号： | AT42QT1110-AZ |
| 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, TQFP-32 |
| 文件页数： | 13/46页 |
| 文件大小： | 657K |
| 代理商： | AT42QT1110-AZ |
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9570I–AT42–03/10
AT42QT1110-MZ/AT42QT1110-AZ
Figure 4-9.
Guard Channel Example
4.10
Self-test Functions
4.10.1
Internal Hardware Tests
Internal hardware tests check for hardware failure in the device’s internal memory areas and
data paths. Any failure detected in the function or contents of application ROM, RAM or registers
causes the device to reset itself.
The application code is scanned with a CRC check routine to confirm that the application data is
all correct.
The RAM and registers are checked periodically (every 10 seconds) for dynamic and static
failures.
4.10.2
Functional Checks
Functional checks confirm that the device is operating within expected parameters; any failure
detected in these tests is notified to the system host. The device will continue to operate in the
event that such functional failures are detected.
The functional tests are:
Check that the channel-measurement signals are within the defined range.
Confirm that data stored in the EEPROM is valid.
These tests are carried out as the particular functions are used. For example, the EEPROM is
checked when the device attempts to load data from EEPROM, and the channel signals are
checked when a measurement is carried out.
Note:
If a particular channel is unused, the threshold of that channel should be set to 0 to
prevent the incorrect reporting of the unused channel as being in an error state.
4.11
Signal Processing
4.11.1
Detection Integrator
The device features a detection integration mechanism, which acts to confirm a detection in a
robust fashion. A per-key counter is incremented each time the key has exceeded its threshold.
When this counter reaches a preset limit the key is finally declared to be touched. For example,
if the DI limit is set to 10, then a key’s signal must fall by more than the key threshold, and
remain below that level for 10 acquisitions, before the key is declared to be touched.
Similarly, the DI is applied to a key that is going out of detect: it must take 10 acquisitions where
the signal has not exceeded its detect threshold before it is declared to leave touch.
Guard Channel
Formed of One Key
Key Pad Formed
of Six Keys
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| AT42QT1110-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: |
| AT42QT1110-MU QS470 | 功能描述:IC TOUCH SENSOR 11KEY 32QFN RoHS:是 类别:集成电路 (IC) >> 数据采集 - 触摸屏控制器 系列:QTouch™ 标准包装:96 系列:- 类型:- 触摸面板接口:- 输入数/键:- 分辨率（位）:- 评估套件:* 数据接口:- 数据速率/采样率 (SPS，BPS):- 电压基准:- 电源电压:- 电流 - 电源:- 工作温度:- 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:带卷 (TR) |
| AT42QT1110-MUR | 功能描述:QTOUCH 11 KEY TOUCH SENSOR IC 制造商:microchip technology 系列:* 包装:剪切带（CT） 零件状态:在售 封装/外壳:32-VFQFN 裸露焊盘 供应商器件封装:32-QFN（5x5） 标准包装:1 |
| AT42QT1110-MZ | 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-AU | 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: |
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