ucb1200 NXP Semiconductors, ucb1200 Datasheet - Page 18

• Manufacturer Part Number: ucb1200
• Description: Advanced Modem/audio Analog Front-end
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TOUCH SCREEN MODE SELECTION
SUMMARY OF TOUCH SCREEN MODES; note 1
Notes
1. Control register address 9 is used for touch screen mode selection.
2. The powered and grounded touch screen pins may be interchanged.
3. In this mode, the touch screen bias must be disabled by the user to prevent false interrupts.
1998 Jul 22
00
01
10
11
X position
Y position
pressure - 1
pressure - 2
pressure - 3
pressure - 4
pressure - 5
X-plate resistance powered
Y-plate resistance
interrupt
TOUCH SCREEN
MEASUREMENT
Advanced modem/audio analog front-end
TSC_MODE[N]
powered
ADC_INPUT[n]
powered
powered
floating
floating
grounded
floating
powered
interrupt
pressure
position
position
SELECTED BITS
TSPX
(2)
(2)
(2)
grounded
ADC_INPUT[n]
powered
floating
grounded
powered
floating
grounded
floating
powered
resistor to V
touch screen bias circuit
touch screen bias circuit
touch screen bias circuit
TSMX
(2)
(2)
(2)
TOUCH SCREEN BIAS
SOURCE
DDA1
ADC_INPUT[n]
powered
grounded
grounded
powered
floating
floating
floating
powered
grounded
18
TSPY
(2)
(2)
(2)
ADC_INPUT[n]
grounded
grounded
floating
floating
grounded
powered
floating
grounded
grounded
defined by ADC_INPUT[n]
touch screen current monitor
defined by ADC_INPUT[n]
defined by ADC_INPUT[n]
TSMY
ADC MULTIPLEXER SETTING
(2)
(2)
(2)
position
position
pressure
pressure
pressure
pressure
pressure
pressure
pressure
interrupt
SCREEN
TOUCH
MODE
Product specification
UCB1200
enabled
enabled
enabled
enabled
enabled
enabled
enabled
enabled
enabled
disabled
SCREEN
TOUCH
BIAS
(3)