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AT42QT2100 데이터시트 PDF




ATMEL Corporation에서 제조한 전자 부품 AT42QT2100은 전자 산업 및 응용 분야에서
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부품번호 AT42QT2100 기능
기능 QTouch Touch Sensor IC
제조업체 ATMEL Corporation
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AT42QT2100 데이터시트, 핀배열, 회로
Atmel AT42QT2100
QTouch Touch Sensor IC
DATASHEET
Features
Number of QTouch® Keys:
– 0 to 7, one slider or one wheel
Technology:
– Patented spread-spectrum charge-transfer
Key Outline Sizes:
– 5 mm x 5 mm or larger (panel thickness dependent); widely different sizes
and shapes possible
Key Spacing:
– 6 mm or wider, center to center (panel thickness, human factors
dependent)
Key Design:
– Single solid or ring shaped electrodes; wide variety of possible layouts
Wheel Size:
– Typically 30 – 50 mm diameter, resistively interpolated wheel up to 80 mm
diameter, typical width 12 mm
Slider Size:
– Typically 50 – 100 mm length, typical width 12 mm
Slider/Wheel Electrode Design:
– Choice of spatially interpolated (resistorless) or resistively interpolated
design
– Slider can be an arc or other irregular shape
Layers Required:
– One layer substrate; electrodes and components can be on same side
Substrates:
– FR-4, low cost CEM-1 or FR-2 PCB materials; polyamide FPCB; PET films,
glass
Electrode Materials:
– Copper, silver, carbon, ITO, virtually anything electrically conductive
Panel materials:
– Plastic, glass, composites, painted surfaces (nonconductive paints)
Adjacent Metal:
– Compatible with grounded metal immediately next to keys
Panel Thickness:
– For keys, up to 15 mm glass, 10 mm plastic (key size dependent)
– For slider/wheel, up to 4 mm glass, 3 mm plastic
Key Sensitivity:
– Adjustable via change in sampling capacitor (Cs) value
9554E–AT42–01/13




AT42QT2100 pdf, 반도체, 판매, 대치품
Table 1-1. Pin Listing (Continued)
Pin
Name
Type
13 SNSB7 (1) I/O
14 SS
I
15 MOSI
I
16 MISO OF
17 SCK
I
18 VDD
P
19 DRDY OF
20 CHANGE OF
21 VSS
P
22 SPREAD OD
23 SNSA1 (1) I/O
24 SNSKA1 I/O
25 SNSA2 (1) I/O
26 SNSKA2 I/O
27 SNSA3 (1) I/O
28 SNSKA3 I/O
29 RESET
I
30 SNSB1 (1) I/O
31 SNSKB1 I/O
32 SNSB2 (1) I/O
Function
Sense pin. Connect to CsB7
SPI Slave Select (active low)
SPI Master Out /Slave In
SPI Master In/Serial Out
SPI Clock
Power
SPI Data Ready handshake line
State change notification
Ground
Spread-spectrum drive
Connect to Vdd (high) to enable
Connect to Vss (low) to disable
Sense pin. Connect to CsA1
Sense pin. Connect to any CsA + slider/wheel
Sense pin. Connect to CsA2
Sense pin. Connect to any CsA + slider/wheel
Sense pin. Connect to CsA3
Sense pin. Connect to any CsA + slider/wheel
Reset (active low)
Sense pin. Connect to CsB1
Sense pin. Connect to any CsB + Key
Sense pin. Connect to CsB2
If Unused, Connect To...
Open
-
-
-
-
-
Open
Open
-
-
Open
Open
Open
Open
Open
Open
Vdd via resistor
Open
Open
Open
1. SNS terminals can be paired with any SNSK terminals of the same group. For example, SNSA1 can be paired with
any SNSKA terminal.
I/O CMOS input/output
I CMOS input only
OD CMOS open drain output (pull-up to Vdd)
OF CMOS output that can float during Reset, Sleep or LP modes
P Ground or power
AT42QT2100 [DATASHEET]
9554E–AT42–01/13
4

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AT42QT2100 전자부품, 판매, 대치품
2.5 Proximity Effect
Any number of keys can be programmed to have hand or body proximity. By using a relatively large electrode inside
the product enclosure and a larger value of CsB, the product can auto power up or activate its display with hand
approach. This simple feature can add enormous sales appeal to almost any product.However, if using AKS see
Section 4.3.6 on page 15.
2.6 Moisture Tolerance
The presence of water (condensation, sweat, spilt water, and so on) on a sensor can alter the signal values
measured and thereby affect the performance of any capacitive device. The moisture tolerance of QTouch devices
can be improved by designing the hardware and fine-tuning the firmware following the recommendations in the
application note Atmel AVR3002: Moisture Tolerant QTouch Design (www.atmel.com/Images/doc42017.pdf).
2.7 SPI Interface
The QT2100 is an SPI slave mode device, utilizing a four-wire full-duplex SPI interface.
In addition to the standard four SPI signals (SS, SCK, MOSI and MISO), there is a DRDY (data ready) output which
may optionally be used to time communications such that they do not occur during channel measurement bursts.
During each burst DRDY is held low by the QT2100. After each group burst, DRDY is driven high for 500 µs or until
3 bytes have been exchanged.
The QT2100 also provides a CHANGE signal to indicate when there has been a change in detection state. This
removes the need for the host to poll the QT2100 continuously.
On each SPI transfer the host sends three bytes to the QT2100 and the QT2100 simultaneously sends three bytes to
the host. The bytes sent from the host provide the QT2100 with all its configuration information; the bytes sent from
the QT2100 convey the states of the touch keys and slider or wheel.
AT42QT2100 [DATASHEET]
9554E–AT42–01/13
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부품번호상세설명 및 기능제조사
AT42QT2100

QTouch Touch Sensor IC

ATMEL Corporation
ATMEL Corporation

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