SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 923

• Manufacturer Part Number: SAM9G10
• Manufacturer: Atmel Corporation

Specifications of SAM9G10

• Flash (kbytes): 0 Kbytes
• Pin Count: 217
• Max. Operating Frequency: 266 MHz
• Cpu: ARM926
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 96
• Ext Interrupts: 96
• Usb Transceiver: 3
• Usb Speed: Full Speed
• Usb Interface: Host, Device
• Spi: 2
• Twi (i2c): 1
• Uart: 4
• Ssc: 3
• Sd / Emmc: 1
• Graphic Lcd: Yes
• Video Decoder: No
• Camera Interface: No
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 16
• Self Program Memory: NO
• External Bus Interface: 1
• Dram Memory: sdram
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 1.08 to 1.32
• Fpu: No
• Mpu / Mmu: No/Yes
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

41.7.6
11053B–ATARM–22-Sep-11
5-wire Position Measurement Method
Figure 41-8. 5-Wire principle
In an application only monitoring clicks, 100 points per second is typically needed. For handwrit-
ing or motion detection, the number of measurements to consider is approximately 200 points
per second. This must take into account that multiple measurements are included (over sam-
pling, filtering) to compute the correct point.
The 5-wire touchscreen panel works by applying a voltage at the corners of the resistive layer
and measuring the vertical or horizontal resistive network with the sense input. The ADC con-
verts the voltage measured at the point the panel is touched.
A measurement of the Y position of the pointing device is made by:
A measurement of the X position of the pointing device is made by:
• Connecting Upper left (UL) and upper right (UR) corners to VDDANA
• Connecting Lower left (LL) and lower right (LR) corners to ground.
• The voltage measured is determined by the voltage divider developed at the point of touch
• Connecting the upper left (UL) and lower left (LL) corners to ground
• Connecting the upper right and lower right corners to VDDANA.
• The voltage measured is determined by the voltage divider developed at the point of touch
(Yposition) and the SENSE input is converted by ADC.
(Xposition) and the SENSE input is converted by ADC.
L
L
VDDANA
VDDANA for Xp
GND for Yp
U
L
L
L
U
Conductive Layer
L
Contact
Pen
U
GND
L
VDDANA for Yp
GND for Xp
Resistive layer
R
R
Sense
L
R
SAM9G35
U
Sense
R
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