SX8661I07AULTRT Semtech, SX8661I07AULTRT Datasheet - Page 48

• Manufacturer Part Number: SX8661I07AULTRT
• Description: IC, Capacitive Button Touch And Proximity Controller, 8 SENSOR, MLPQ-28
• Manufacturer: Semtech

Specifications of SX8661I07AULTRT

• Controller Type: Capacitive Touch Screen
• Ic Interface Type: I2C
• Supply Voltage Range: 2.7V To 3.6V
• Operating Temperature Range: -40°C To +85°C

ADVANCED COMMUNICATIONS & SENSING
CapModeMisc:
CapMode7_4, CapMode3_0:
The CAP7 to CAP0 pins can be set as a button or disabled depending on the application.
CAP0 can be used for proximity sensing (additionally set register CapProxEnable).
Revision v3.2, January 2011
Capacitive Sensors Parameters
Address
0x70
By default the ASI is using an individual sensitivity for each CAP pin (with proximity sensor set to maximum
sensitivity while touch sensors are set to a lower one). The individual sensitivity mode results in longer sensing
periods than required in common sensitivity mode.
The ASI can use common sensitivity for all capacitive sensors in the case overlay material and sensors sizes
are about equal. The register bits CapSensitivity0_1[7:4] determine the sensitivity for all sensors in common
sensitivity mode.
Buttons and disabled CAP pins can be attributed freely (examples in Figure 52).
Name
CapProxEnable
Buttons
Buttons
Table 17
Table 16
Bits Description
7:0 Enables proximity sensing.
Number of buttons (with CAP0 = button or disabled)
0x46: OFF
0x74: ON (default)
Table 15
Number of buttons (with CAP0 = proximity)
Low Power, Capacitive Button Touch and Proximity Controller
minimum
minimum
zero
one
© 2011 Semtech Corp.
Capacitive Sensors Parameters
48
(8 sensors) with LED Drivers and Analog Output
maximum
maximum
seven
eight
0x7: 7 seconds
0x8: 16 seconds
0x9: 18 seconds
…
0xE: 28 seconds
0xF: 60 seconds
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SX8661