sx8650 Semtech Corporation, sx8650 Datasheet - Page 44

• Manufacturer Part Number: sx8650
• Description: World?s Lowest Power & Smallest Footprint 4-wire Resistive Touchscreen Controller With 15kv Esd
• Manufacturer: Semtech Corporation

The coordinate rate in pen trigger mode is determined by the speed of the host reading the channels and the conversion
times of the channels. The host performs the minimum number of I2C commands in this mode.
Figure 40 shows the PENTRIG mode. In this example, the host waits for the NIRQ interrupt to make the acquisition of the
x,y data. After the first sample, I2C control traffic is reduced as only I2C reads are required.
ACS Revision V2.15/October 2009
©2009 Semtech Corp.
ADVANCED COMMUNICATIONS & SENSING
Pen detected
I2C
NIRQ
init setup
Conversion time
Figure 40.
x,y
World’s Lowest Power & Smallest Footprint 4-wire
Resistive Touchscreen Controller with 15kV ESD
read x, y
position
Page 43
Pen trigger mode
Conversion time
x,y
read x, y
position
www.semtech.com
DATASHEET
SX8650