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參數(shù)資料
| 型號(hào)： | CAP1014-1-EZK |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 模擬信號(hào)調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, QCC32 |
| 封裝： | 5 X 5 MM, 0.50 MM PITCH, ROHS COMPLIANT, QFN-32 |
| 文件頁數(shù)： | 35/73頁 |
| 文件大?。?/td> | 945K |
| 代理商： | CAP1014-1-EZK |
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Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Revision 1.64 (01-15-09)
40
SMSC CAP1014
DATASHEET
The Sensor Delta Count registers store the delta count that is compared against the threshold used to
determine if a touch has been detected. The count value represents a change in input due to the
capacitor associated with a touch on one of the sensors and is referenced to a calibrated base “Not
touched” count value. The delta is an instantaneous change and is updated once per sensor per
sensing cycle (see Section 4.4.3 - sensor cycle).
The value presented is a standard 2’s complement number. In addition, the value is capped at a value
of 7Fh. A reading of 7Fh indicates that the sensitivity settings are too high and should be adjusted
accordingly (see Section 5.12).
The value is also capped at a negative value of FFh for negative delta counts which may result upon
a release.
5.11
Queue Control Register
The Queue Control register determines the number of consecutive samples for which a single sensor
output is above the Sensor Threshold before a touch is detected. This is also used to determine the
number of consecutive samples used to detect a button release. The queue applies independently to
all channels.
Bits 2 - 0 - QUEUE_B[2:0] - The number of consecutive samples necessary to detect a touch. Default
is 3 consecutive samples. See Table 5.14.
1Dh
R
Sensor 14
Delta Count
Sign
64
32
16
8
4
2
1
00h
Table 5.13 Queue Control Register
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
1Eh
R/W
Button Queue
Control
-
QUEUE_B[2:0]
03h
Table 5.14 QUEUE_B Bit Decode
QUEUE_B[3:0]
NUMBER OF CONSECUTIVE
READINGS > THRESHOLD
21
0
00
0
1
00
1
01
0
2
01
1
3
10
0
4
10
1
5
11
0
6
11
1
7
Table 5.12 Sensor Delta Count Registers (continued)
ADDR
R/W
REGISTER
B7
B6
B5
B4
B3
B2
B1
B0
DEFAULT
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相關(guān)代理商/技術(shù)參數(shù) |
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| CAP1014-1-EZK-TR | 制造商:SMSC 制造商全稱:SMSC 功能描述:Multiple Channel Capacitive Touch Sensor and LED Driver |
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| CAP1026-1-AP-TR | 制造商:SMSC 制造商全稱:SMSC 功能描述:6 Channel Capacitive Touch Sensor with 2 LED Drivers |
| CAP1028 | 制造商:SMSC 制造商全稱:SMSC 功能描述:8 Channel Capacitive Touch Sensor with 2 LED Drivers |
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