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參數(shù)資料
| 型號： | AT42QT1111-AU |
| 廠商： | ATMEL CORP |
| 元件分類： | 速度傳感器和接近開關(guān) |
| 英文描述： | PROXIMITY SENSOR-CAPACITIVE, 0-5V, SQUARE, SURFACE MOUNT |
| 封裝： | 7 X 7 MM, 1 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, MS-026ABA, TQFP-32 |
| 文件頁數(shù)： | 27/50頁 |
| 文件大小： | 637K |
| 代理商： | AT42QT1111-AU |
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33
9571B–AT42–08/10
AT42QT1111-MU/AT42QT1111-AU
7.10
Address 6: Lower Burst Limit (LBL)
Normal QTouch signals are in the range of 100 to 1000 counts for each key. The lower burst
limit determines the minimum signal that is considered as a valid acquisition. If the count is lower
than the lower burst limit, it is considered not to be valid and the key is set to an Error state.
Note:
Where a key has a signal of less than the LBL, the key is set to its “no detect” state. If
the key signal rises above LBL, but remains under the detection level (that is: reference
signal - detection threshold), the Detect Integration is applied. In this case the detection
is not reported immediately but is delayed until the DI filter confirms detection.
Default value:
18
7.11
Addresses 7–8: AKS Mask
AKS_n (AKS Mask): 0 = key n AKS disabled, 1 = key n AKS enabled (where n is 0–10).
These bits control which keys have AKS enabled (see Section 3 on page 8). A “1” means the
corresponding key has AKS enabled; a “0” means that the corresponding key has AKS disabled.
Default AKS mask:
0x07 and 0xFF (all keys have AKS enabled)
7.12
Addresses 9–15: Detect0 – Detect6 PWM
Each of the 7 detect pins can be configured to output a PWM signal to indicate whether the key
is touched (in detect) or not touched (out of detect).
The Detect outputs must be enabled by selecting 7-key mode in the “Device Mode” setting (see
Section 7.4 on page 29), and the corresponding “Key to LED” bits must be set to enable the
individual “Detect” outputs for each key (see Section 7.14 on page 35).
Table 7-8.
Lower Burst Limit
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
6LBL
Table 7-9.
AKS Mask
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
7
AKS_10
AKS_9
AKS_8
8
AKS_7
AKS_6
AKS_5
AKS_4
AKS_3
AKS_2
AKS_1
AKS_0
Table 7-10.
Detect0 – Detect6 PWM
Address
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
9
IN_DETECT0
OUT_DETECT0
10
IN_DETECT1
OUT_DETECT1
11
IN_DETECT2
OUT_DETECT2
12
IN_DETECT3
OUT_DETECT3
13
IN_DETECT4
OUT_DETECT4
14
IN_DETECT5
OUT_DETECT5
15
IN_DETECT6
OUT_DETECT6
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