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AR1000 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 AR1000
기능 Resistive Touch Screen Controller
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AR1000 데이터시트, 핀배열, 회로
AR1000 SERIES RESISTIVE TOUCH
SCREEN CONTROLLER
AR1000 Series Resistive Touch Screen Controller
Special Features
• RoHS Compliant
• Power-Saving Sleep mode
• Industrial Temperature Range
• Built-in Drift Compensation Algorithm
• 128 Bytes of User EEPROM
Power Requirements
• Operating Voltage: 2.5-5.0V ±5%
• Standby Current:
- 5V: 85 µA, typical; 125 µA (maximum)
- 2.5V: 40 µA, typical; 60 µA (maximum)
• Operating “No touch” Current:
- 3.0 mA (typical)
• Operating “Touch” Current:
- 17 mA, typical, with a touch sensor having
200layers
- Actual current is dependent on the touch
sensor used
• AR1011/AR1021 Brown-Out Detection (BOR) set
to 2.2V
Touch Modes
• Off, Stream, Down, Up and more.
Touch Sensor Support
• 4-Wire, 5-Wire and 8-Wire Analog Resistive
• Lead-to-Lead Resistance: 50-2,000typical)
• Layer-to-Layer Capacitance: 0-0.5 µF
• Touch Sensor Time Constant: 500 µs (maximum)
Touch Resolution
• 10-bit Resolution (maximum)
Touch Coordinate Report Rate
• 140 Reports Per Second (typical) with a Touch
Sensor of 0.02 µF with 200Layers
• Actual Report Rate is dependent on the Touch
Sensor used
Communications
• SPI, Slave mode, p/n AR1021
• I2C, Slave mode, p/n, AR1021
• UART, 9600 Baud Rate, p/n AR1011
2009-2016 Microchip Technology Inc.
DS40001393C-page 1




AR1000 pdf, 반도체, 판매, 대치품
AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER
TABLE 1-1: PIN DESCRIPTIONS
Pin
SSOP, SOIC
1
2
3
QFN
18
19
20
41
52
63
74
85
96
10 7
11 8
12 9
13 10
14 11
15 12
16 13
17 14
18 15
19 16
20 17
Function
VDD
M1
SY-
M2
WAKE
SIQ
SY+
SS
SDO
NC
SCK/SCL/TX
NC
SDI/SDA/RX
SX+
Y+
Y-
5WSX-
X+
X-
VSS
Description/Comments
Supply Voltage
Communication Selection
Sense Y- (8-wire). Tie to VSS, if
not used.
4/8-wire or 5-wire Sensor
Selection
Touch Wake-up/Touch Detection
LED Drive/SPI Interrupt. No
connect, if not used.
Sense Y+ (8-wire). Tie to VSS, if
not used.
Slave Select (SPI). Tie to VSS, if
not used.
SPI Serial Data Output/I2C
Interrupt. Tie to Vss, if UART.
No connection. No connect or tie
to VSS or VDD.
SPI/I2C Serial Clock/UART
Transmit
No connection. No connect or tie
to VSS or VDD.
I2C Serial Data/SPI Serial Data
Input/UART Receive
Sense X+ (8-wire). Tie to VSS, if
not used.
Y+ Drive
Y- Drive
5W Sense (5-wire)/Sense X-
(8-wire). Tie to VSS, if not used.
X+ Drive
X- Drive
Supply Voltage Ground
DS40001393C-page 4
2009-2016 Microchip Technology Inc.

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AR1000 전자부품, 판매, 대치품
AR1000 SERIES RESISTIVE TOUCH SCREEN CONTROLLER
2.4 8-Wire Sensor
An 8-wire resistive touch sensor consists of a stable
and flex layer, electrically separated by spacer dots.
The layers are assembled perpendicular to each other.
The touch position is determined by first applying a
voltage gradient across the flex layer and using the
stable layer to measure the flex layer’s touch position
voltage. The second step is applying a voltage gradient
across the stable layer and using the flex layer to
measure the stable layer’s touch position voltage.
The measured voltage at any position across a driven
axis is predictable. A touch moving in the direction of
the driven axis will yield a linearly changing voltage. A
touch moving perpendicular to the driven axis will yield
a relatively unchanging voltage.
FIGURE 2-2:
8-WIRE DECODING
The basic decoding of an 8-wire sensor is similar to a
4-wire. The difference is that an 8-wire sensor has four
additional interconnects used to reference sensor
voltage back to the controller.
A touch system may experience voltage losses due to
resistance changes in the bus bars and connection
between the controller and sensor. The losses can vary
with product use, temperature, and humidity. In a
4-wire sensor, variations in the losses manifest
themselves as error or drift in the reported touch
location. The four additional sense lines found on
8-wire sensors are added to dynamically reference the
voltage to correct for this fluctuation during use (See
Figure 2-2).
2009-2016 Microchip Technology Inc.
DS40001393C-page 7

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부품번호상세설명 및 기능제조사
AR1000

Resistive Touch Screen Controller

Microchip Technology
Microchip Technology

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