MXB7843(2002) Ver la hoja de datos (PDF) - Maxim Integrated

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Fabricante

MXB7843
(Rev.:2002)

2.375V to 5.25V, 4-Wire Touch-Screen Controller

Maxim Integrated 

2.375V to 5.25V, 4-Wire Touch-Screen

Controller

Pin Description

PIN

NAME

FUNCTION

1

VDD

Positive Supply Voltage. Connect to pin 10.

2

X+

X+ Position Input, ADC Input Channel 1

3

Y+

Y+ Position Input, ADC Input Channel 2

4

X-

X- Position Input

5

Y-

Y- Position Input

6

GND Ground

7

IN3

Auxiliary Input to ADC; ADC Input Channel 3

8

IN4

Auxiliary Input to ADC; ADC Input Channel 4

9

REF

Voltage Reference Input. Reference voltage for analog-to-digital conversion. Apply a reference

voltage between 1V and VDD. Bypass REF to GND with a 0.1µF capacitor.

10

VDD

Positive Supply Voltage, +2.375V to +5.25V. Bypass with a 1µF capacitor. Connect to pin 1.

11

PENIRQ Pen Interrupt Output. Open anode output. 10kΩ to 100kΩ pullup resistor required to VDD.

12

DOUT

Serial Data Output. Data changes state on the falling edge of DCLK. High impedance when CS is

HIGH.

13

BUSY

Busy Output. BUSY pulses high for one clock period before the MSB decision. High impedance when

CS is HIGH.

14

DIN

Serial Data Input. Data clocked in on the rising edge of DCLK.

15

CS

Active-Low Chip Select. Data is only clocked into DIN when CS is low. When CS is high, DOUT and

BUSY are high impedance.

16

DCLK

Serial Clock Input. Clocks data in and out of the serial interface and sets the conversion speed (duty

cycle must be 40% to 60%).

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