AT42QT1111-MU Atmel, AT42QT1111-MU Datasheet - Page 35

• Manufacturer Part Number: AT42QT1111-MU
• Description: IC TOUCH SENSOR 11KEY QFN
• Manufacturer: Atmel
• Series: QTouch™r
• Type: Capacitiver

Specifications of AT42QT1111-MU

• Touch Panel Interface: 10, 2-Wire
• Number Of Inputs/keys: 11 Key
• Data Interface: Serial, SPI™
• Voltage Reference: Internal
• Voltage - Supply: 3 V ~ 5.5 V
• Current - Supply: 12mA
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN Exposed Pad
• Output Type: Logic
• Interface: SPI
• Input Type: Logic
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: AT42QT1111-MU; AT42QT1111-MUTR

7.14
7.15
7.16
9571A–AT42–02/10
Address 17: LED Fade/Key to LED
Address 18: LED Latch
Addresses 19–29: Negative Threshold (NTHR)/Negative Hysteresis (NHYST)
Table 7-14.
FADE: enables/disables fading for all LEDs. This is a global setting; either all LEDs fade, or
none of them.
0 = disable (no fade).
1 = enable fading on and off.
LED_n: activates the LED output for the corresponding key output DETECTn (where n is 0–6).
1 = enables the “Detect” output to follow the status of the corresponding key.
0 = disable this function, in which case the “Detect” pin will always output its “Out of Detect”
PWM (see
Default FADE value:
Default LED_n value:
Table 7-15.
LATCH_n: enables/disables latching of the LED for the corresponding key output DETECTn
(where n is 0–6).
1 = enables latching. When latching is enabled for a given LED, the LED toggles its state each
time the key is touched.
0 = disables latching.
Note that bit 7 is reserved and should be set to zero.
Default LATCH_n value:
Table 7-16.
Address
Address
Address
17
18
19
20
21
22
23
24
Section 7.12 on page
FADE
Bit 7
Bit 7
Bit 7
LED Fade/Key to LED
LED Latch
Negative Threshold/Negative Hysteresis
0
LATCH_6
LED_6
Bit 6
Bit 6
Bit 6
0 (disabled)
1 (enabled)
0x00 (latch disabled)
AT42QT1111-MU/AT42QT1111-AU
33).
LATCH_5
LED_5
Bit 5
Bit 5
Bit 5
KEY_0_NTHR
KEY_1_NTHR
KEY_2_NTHR
KEY_3_NTHR
KEY_4_NTHR
KEY_5_NTHR
LATCH_4
LED_4
Bit 4
Bit 4
Bit 4
LATCH_3
LED_3
Bit 3
Bit 3
Bit 3
LATCH_2
LED_2
Bit 2
Bit 2
Bit 2
LATCH_1
LED_1
Bit 1
Bit 1
Bit 1
KEY_0_NHSYT
KEY_1_NHSYT
KEY_2_NHSYT
KEY_3_NHSYT
KEY_4_NHSYT
KEY_5_NHSYT
LATCH_0
LED_0
Bit 0
Bit 0
Bit 0
35