ATxmega128B3 Atmel Corporation, ATxmega128B3 Datasheet - Page 306

• Manufacturer Part Number: ATxmega128B3
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B3

• Flash (kbytes): 128 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

24.4.5
24.4.6
24.4.7
8291A–AVR–10/11
Low Power Waveform
Operation in Sleep Modes
ASCII Character Mapping
To reduce toggle activity and hence power consumption, a low power waveform (LPWAV=1)
can be selected. The low power waveform requires two subsequent frames with the same dis-
play data to obtain zero DC voltage. Consequently, the interrupt flag is only set every two
frames. Default and the low power waveform is shown in
and 1/3 bias. For other selections of duty and bias, the effect is similar.
Figure 24-7. Low Power Waveform With Three Common Terminals
The LCD will continue to operate in Idle mode, in Power-save mode and in Extended Standby
mode (blinking included).
The LCD controller can automatically handle ASCII characters. Instead of setting and clearing
segments of the digit, the user enters the ASCII code and the Digit Decoder updates itself the
corresponding segment values in the Display Memory.
Up to 4 types of character mapping are supported.
Figure 24-8. ASCII Character Mapping
Character mapping saves execution time and allows a fast return to Power-save or Extended
Standby mode after display updates.
7-Segment
- 3 COM
- 3 SEG
term
term
.
.
7-Segment
- 4 COM
- 2 SEG
term
term
.
.
14-Segment
- 4 COM
- 4 SEG
Atmel AVR XMEGA B
term
term
Figure 24-7 on page 306
.
.
16-Segment
- 3 COM
- 6 SEG
term
term
.
.
for 1/3 duty
306