SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 922

• 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

41.7.5
922
SAM9G35
5-wire Resistive Touchscreen Principles
Figure 41-7. Pressure Measurement
To make a 5-wire touchscreen, a resistive layer with a contact point at each corner and a con-
ductive layer are used.
The 5-wire touchscreen differs from the 4-wire type mainly in that the voltage gradient is applied
only to one layer, the resistive layer, while the other layer is the sense layer for both
measurements.
The measurement of the X position is obtained by biasing the upper left corner and lower left
corner to V
To measure along the Y axis, bias the upper left corner and upper right corner to V
bias the lower left corner and lower right corner to ground.
Resistor
Resistor
Switch
Switch
DDANA
X
X
VDDANA
M
P
GND
XPos Measure(Yp)
and the upper right corner and lower right to ground.
Rp
Open
circuit
Y
Y
P
M
Resistor
Switch
X
X
M
P
GND
Z1 Measure(Xp)
Resistor
Switch
Rp
VDDANA
Open
circuit
Y
Y
P
M
X
X
M
P
Open
GND
circuit
Z2 Measure(Xp)
Resistor
Switch
Rp
VDDANA
11053B–ATARM–22-Sep-11
Y
Y
Resistor
P
M
Switch
DDANA
and