SAM9X35 Atmel Corporation, SAM9X35 Datasheet - Page 972
SAM9X35
Manufacturer Part Number
SAM9X35
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9X25.pdf
(45 pages)
3.SAM9X25.pdf
(1145 pages)
4.SAM9X25.pdf
(45 pages)
5.SAM9X25.pdf
(1325 pages)
Specifications of SAM9X35
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
105
Ext Interrupts
105
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
3
Uart
7
Can
2
Lin
4
Ssc
1
Ethernet
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
DDR/LPDDR, SDRAM/LPSDR
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9261 PDF datasheet
- SAM9X25 PDF datasheet #2
- SAM9X25 PDF datasheet #3
- SAM9X25 PDF datasheet #4
- SAM9X25 PDF datasheet #5
- Current page: 972 of 1325
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42.7.5
972
SAM9X35
5-wire Resistive Touchscreen Principles
Figure 42-7. 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
11055B–ATARM–22-Sep-11
Y
Y
Resistor
P
M
Switch
DDANA
and
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