ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 305
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ATxmega64B3
Manufacturer Part Number
ATxmega64B3
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64B3
Flash (kbytes)
64 Kbytes
Pin Count
64
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
36
Ext Interrupts
36
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
1
Segment Lcd
100
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.6 to 3.6
Operating Voltage (vcc)
1.6 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
2
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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24.4.3
Figure 24-5. Driving an LCD With Three Common Terminals
24.4.4
Figure 24-6. Driving an LCD With Four Common Terminals
8291A–AVR–10/11
-1/3 V
-2/3 V
2/3 V
1/3 V
2/3 V
1/3 V
2/3 V
1/3 V
- V
GND
GND
GND
V
V
V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
1/3 Duty and 1/3 Bias
1/4 Duty and 1/3 Bias
Frame
1/3 bias is usually recommended for an LCD with three common terminals (1/3 duty). The wave-
form is shown in
“ON” and SEG0-COM1 is the voltage across a segment that is “OFF”.
1/3 bias is optimal for an LCD displays with four common terminals (1/4 duty). The waveform is
shown in
and SEG0-COM1 is the voltage across a segment that is “OFF”.
Figure 24-6 on page
Frame
Figure 24-5 on page
SEG0
COM0
SEG0-COM0
305. SEG0-COM0 is the voltage across a segment that is ON”
-1/3 V
-2/3 V
305. SEG0-COM0 is the voltage across a segment that is
2/3 V
1/3 V
2/3 V
1/3 V
2/3 V
1/3 V
- V
GND
GND
GND
V
V
V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
Frame
Atmel AVR XMEGA B
Frame
SEG0
COM1
SEG0-COM1
305
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