AT32UC3L032-D3UR Atmel, AT32UC3L032-D3UR Datasheet - Page 607

• Manufacturer Part Number: AT32UC3L032-D3UR
• Description: MCU AVR32 32KB FLASH 48TLLGA
• Manufacturer: Atmel
• Series: AVR®32 UC3r

Specifications of AT32UC3L032-D3UR

• Core Processor: AVR
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, PWM, WDT
• Number Of I /o: 36
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.62 V ~ 3.6 V
• Data Converters: A/D 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TLLGA
• Processor Series: AT32UC3x
• Core: AVR32
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: SPI, TWI, USART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 36
• Number Of Timers: 7
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR32, EWAVR32-BL
• Development Tools By Supplier: AT32UC3L-EK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 9 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

26.7.1
26.7.2
32099F–11/2010
Resistive Touch Screen Principles
Position Measurement Method
The resistive touch screen film is connected to the ADCIFB using the AD and ADP pins. See
Section 26.7.3
Resistive Touch Screen Mode is enabled by writing a one to the Touch Screen ADC Mode field
in the Mode Register (MR.TSAMOD). In this mode, channels TSPO+0 though TSPO+3 are
automatically enabled where TSPO refers to the Touch Screen Pin Offset field in the Mode Reg-
ister (MR.TSPO). For each conversion sequence, all enabled channels before TSPO+0 and
after TSPO+3 are converted as ordinary ADC channels, producing 1 conversion result each.
When the sequencer enters the TSPO+0 channel the Resistive Touch Screen Sequencer will
take over control and convert the next 4 channels as described in
A resistive touch screen is based on two resistive films, each one fitted with a pair of electrodes,
placed at the top and bottom on one film, and on the right and left on the other. Between the two,
there is a layer that acts as an insulator, but makes a connection when pressure is applied to the
screen. This is illustrated in
Figure 26-2. Resistive Touch Screen Position Measurement
As shown in
to X
there is a voltage gradient from top to bottom on the first film. When a contact is performed on
the screen, the voltage at the contact point propagates to the second film. If the input impedance
on the Y
age at the contact point to be measured at Y
position component of the contact point.
For the horizontal direction, the same method is used, but by applying voltage from Y
Y
m
(left) and measuring at X
P
(top) and X
P
(right) and Y
Figure 26-2 on page
Vertical Position Detection
for details.
X
m
X
M
P
(bottom) leaving Y
m
Y
(left) electrodes are high enough, no current will flow, allowing the volt-
M
Y
P
Figure 26-2 on page
P
.
Volt
VDD
GND
607, to detect the position of a contact, voltage is first applied
X
p
M
and Y
Contact
Pen
m
tristated. Due to the linear resistance of the film,
p
. The value measured represents the vertical
607.
X
AT32UC3L016/32/64
P
Horizontal Position Detection
Y
Y
M
P
Y
P
Section
X
P
26.7.4.
Volt
VDD
GND
P
(right) to
607