AT42QT1070-MMH Atmel, AT42QT1070-MMH Datasheet - Page 23

• Manufacturer Part Number: AT42QT1070-MMH
• Description: IC TOUCH SENSOR 7KEY 20-VQFN
• Manufacturer: Atmel
• Type: Capacitiver

Specifications of AT42QT1070-MMH

• Number Of Inputs/keys: 7 Key (Comms), 5 Key (Standalone)
• Data Interface: I²C
• Voltage Reference: Internal
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-VFQFN Exposed Pad
• Supply Voltage: 1.8 V to 5.5 V
• Dimensions: 3 mm L x 3 mm W x 0.8 mm H
• Temperature Range: - 40 C to + 85 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Supply: -
• Resolution (bits): -
• Touch Panel Interface: -
• Data Rate/sampling Rate (sps, Bps): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

5.13
5.14
5.15
9596A–AT42–10/10
Address 55: Max On Duration
Address 56: Calibrate
Address 57: RESET
Table 5-13.
Table 5-14.
Table 5-15.
MAX ON DURATION: this is a 8-bit value which determines how long any key can be in touch
before it recalibrates itself.
A value of 0 turns Max On Duration off.
Default: 180 (160 ms x 180 = 28.8s)
Writing any nonzero value into this address triggers the device to start a calibration cycle. The
CALIBRATE flag in the detection status register is set when the calibration begins and clears
when the calibration has finished.
Writing any nonzero value to this address triggers the device to reset.
Address
Address
Address
Setting
55
255
56
57
0
1
2
3
4
Max Time On
Calibrate
RESET
b7
b7
b7
160 ms
320 ms
480 ms
640 ms
Time
40.8s
Off
b6
b6
b6
Writing a nonzero value forces a calibration
Writing a nonzero value forces a reset
b5
b5
b5
MAX ON DURATION
b4
b4
b4
b3
b3
b3
b2
b2
b2
AT42QT1070
b1
b1
b1
b0
b0
b0
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