sx8654evk Semtech Corporation, sx8654evk Datasheet - Page 34

• Manufacturer Part Number: sx8654evk
• Description: Haptics Enabled 4/5-wire Resistive Touchscreen Controller With Proximity Sensing
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
Figure 44 – Pen Trigger Mode (RegIrqMsk[6:2] = 00010 ; PROXSCANPERIOD = 001 ie 1/TOUCHRATE)
5.4.3
Similarly to touch operations (Cf. § 4.6.5), if PROXSCANPERIOD is too short for proximity sensing operations to
be completed, the rate tick(s) affected are ignored until operations are completed and the following tick is taken
into account for the next planned operation.
Please note that compensation lasts about ~16 times longer than a normal proximity sensing operation.
Rev 1 – 25
CONVSTAT
I2C Read Channel
TOUCHRATE
PENSTAT
NIRQ
Idle
Pen Detection
tick
Minimum Scan Period (i.e. PROXSCANPERIOD)
th
July 2011
Touch Conversion
Proximity Sensing
Pen Touch
Resistive Touchscreen Controller with Proximity Sensing
34
Pen Release
SX8657/SX8658
Haptics Enabled 4/5-Wire
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