AT42QT2161-MMU Atmel, AT42QT2161-MMU Datasheet - Page 27

• Manufacturer Part Number: AT42QT2161-MMU
• Description: IC TOUCH SENSOR 16KEY QFN M-MOD
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT2161-MMU

• Touch Panel Interface: 8, 2-Wire
• Number Of Inputs/keys: 16 Key, Slider
• Resolution (bits): 10 b
• Data Interface: I²C, Serial
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Current - Supply: 1.14mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 28-VFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

6.6
6.7
6.8
6.9
9614A–AT42–08/10
Address 5: Slider Touch Position
Address 6: GPIO Read
Address 7: Sub-revision
Address 10: Calibrate
Table 6-6.
Table 6-7.
Table 6-8.
Table 6-9.
Position: Last position of the touch on the slider
A change in this byte will cause the CHANGE line to trigger.
GPIO1 – 3: If GPIO1 – 3 are set as inputs, returns the logic level on the respective pin. If a GPIO
is set as an output, the respective bit in GPIO Read will always report “0”.
GPIOs set as inputs are only read once every cycle, i.e. every 16 ms.
A change in this byte will cause the CHANGE line to trigger.
This is an 8-bit sub-revision number that follows the code version (e.g. 1.0.0).
Writing any nonzero value into this address will trigger the QT2161 to start a recalibration on all
enabled keys.
Address
Address
Address
Address
10
5
6
7
Slider Touch Position
GPIO Read
Sub-revision
Calibrate
b7
b7
b7
b7
0
b6
b6
b6
b6
0
b5
b5
b5
b5
0
GPIO3
b4
b4
b4
b4
Sub-revision
CALIBRATE
Position
GPIO2
b3
b3
b3
b3
GPIO1
b2
b2
b2
b2
AT42QT2161
b1
b1
b1
b1
0
b0
b0
b0
b0
0
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