SX8658IWLTRT Semtech, SX8658IWLTRT Datasheet - Page 28

• Manufacturer Part Number: SX8658IWLTRT
• Description: 58T7572
• Manufacturer: Semtech

Specifications of SX8658IWLTRT

• Controller Type: Resistive Touch Screen
• Ic Interface Type: I2C, Serial
• Supply Voltage Range: 2.3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Resolution (bits): 12bit

SX8657/SX8658
Haptics Enabled 4/5-Wire
Resistive Touchscreen Controller with Proximity Sensing
ADVANCED COMMUNICATIONS & SENSING
Figure 33 – ProxRaw Update
5.3.3
PROXUSEFUL Update
PROXUSEFUL update consists in filtering PROXRAW upfront to remove its potential high frequencies
components(system noise, interferer, etc) and extract only user activity (few Hz max) and slow environment
changes.
Figure 34 – PROXUSEFUL Update
F(PROXRAW ; PROXUSEFUL[n-1] ; PROXRAWFILT) = (1 - PROXRAWFILT).PROXRAW + PROXRAWFILT.PROXUSEFUL[n-1]
th
Rev 1 – 25
July 2011
28
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