MAX11803 Maxim Integrated Products, MAX11803 Datasheet - Page 31

• Manufacturer Part Number: MAX11803
• Description: (MAX11800 - MAX11803) Ultra-Small Resistive Touch-Screen Controllers
• Manufacturer: Maxim Integrated Products

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The MAX11800/MAX11801 perform measurements
automatically and inform the AP when they are com-
plete in autonomous conversion mode, reducing data
Figure 14. State Machine Transitions––Autonomous Conversion Mode
Low-Power, Ultra-Small Resistive Touch-Screen
TOUCH
NO
TOUCH-
PULLUP
TOUCH-
PULLUP
DETECT
DETECT
DETECT
POWER
ROUGH
TOUCH
SETUP
DOWN
PANEL
FINE
X
Autonomous Conversion Mode
______________________________________________________________________________________
TIME IS UP
CONVERSION
CONVERSION
AVERAGE
AVERAGE
ACQUIRE
ACQUIRE
Controllers with I
SETUP
PANEL
Y
Y
X
CONVERSION
CONVERSION
LAST
LAST
XY MODE
CONVERSION
AVERAGE
transfers on the serial bus as well as generating fewer
interrupt requests. Figure 14 shows the state machine
transitions for autonomous conversion mode.
ACQUIRE
SETUP
PANEL
Z1
Z
TOUCH-
PULLUP
DETECT
ROUGH
CONVERSION
LAST
TIME IS UP
2
C/SPI Interface
CONVERSION
AVERAGE
TOUCH-
PULLUP
DETECT
FINE
ACQUIRE
Z2
TIME IS UP
CONVERSION
LAST
DETECT
TOUCH
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