MXB7846 Ver la hoja de datos (PDF) - Maxim Integrated
Número de pieza
componentes Descripción
Fabricante
MXB7846 Datasheet PDF : 24 Pages
| |||
2.375V to 5.25V, 4-Wire Touch-Screen Controller
with Internal Reference and Temperature Sensor
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
BAT
Battery Monitoring Inputs; ADC Input Channel 3
8
AUX
Auxiliary Input to ADC; ADC Input Channel 4
Voltage Reference Output/Input. Reference voltage for analog-to-digital conversion. In internal
9
REF
reference mode, the reference buffer provides a 2.50V nominal output. In external reference mode,
apply a reference voltage between 1V and VDD. Bypass REF to GND with a 0.1µF capacitor.
10
VDD
Positive Supply Voltage, +2.375V (2.70V) to +5.25V. External (internal) reference. 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%).
CS
DCLK
DIN
DOUT
tCSS
tCH
tCL
tDS
tDH
tDV
tCP
tDO
tCSH
tTR
tBDV
BUSY
tBTR
tBD
Figure 1. Detailed Serial Interface Timing
8 _______________________________________________________________________________________
Share Link: 