SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 921

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SAM9G10

Manufacturer Part Number
SAM9G10
Description
Manufacturer
Atmel Corporation
Datasheets

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
41.7.4
11053B–ATARM–22-Sep-11
4-wire Pressure Measurement Method
It is possible to correct for switch loss by performing the operation:
This requires additional measurements, as shown in
Figure 41-6. Touchscreen Switches Implementation
The method to measure the pressure (Rp) applied to the touchscreen is based on the known
resistance of the X-Panel resistance (Rxp).
Three conversions (Xpos,Z1,Z2) are necessary to determine the value of Rp (Zaxis resistance).
Rp = Rxp*(Xpos/1024)*[(Z2/Z1)-1]
[VY
P
- VX
M
Horizontal Position Detection
] / [VX
X
X
VDDANA
M
P
P
GND
X
Y
- VX
X
Y
M
M
P
P
Resistor
M
Switch
Resistor
Switch
].
Y
P
VDDANA
VDDANA
GND
GND
Figure
0
1
2
3
Vertical Position Detection
Y
41-6.
Y
VDDANA
M
P
GND
To the ADC
Resistor
Switch
Resistor
Switch
X
SAM9G35
P
921

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