ATxmega256A3B Atmel Corporation, ATxmega256A3B Datasheet - Page 166

• Manufacturer Part Number: ATxmega256A3B
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3B

• Flash (kbytes): 256 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: 47
• Ext Interrupts: 49
• Usb Speed: No
• Usb Interface: No
• Spi: 8
• Twi (i2c): 2
• Uart: 6
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 16
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 4
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

14.12.3
8077H–AVR–12/09
CTRLC - Control Register C
• Bit 3 – Reserved
This bit is unused and reserved for future use. For compatibility with future devices, always write
this bit to zero when this register is written.
• Bit 2:0 – WGMODE[2:0]: Waveform Generation Mode
These bits select the Waveform Generation Mode, and control the counting sequence of the
Counter, the TOP value, the UPDATE condition, the Interrupt/event condition, and type of wave-
form that is generated, according to
No waveform generation is performed in normal mode of operation. For all other modes the
result from the waveform generator will only be directed to the port pins if the corresponding
CCxEN bit has been set to enable this. The port pin direction must be set as output.
Table 14-4.
• Bit 7:4 – Reserved
These bits are unused and reserved for future use. For compatibility with future devices, always
write these bits to zero when this register is written.
• Bit 3:0 – CMPx: Compare Output Value n
These bits allow direct access to the Waveform Generator's output compare value when the
Timer/Counter is set in “OFF” state. This is used to set or clear the WG output value when the
Timer/Counter is not running.
Bit
+0x02
Read/Write
Initial Value
WGMODE[2:0]
000
001
010
011
100
101
110
111
Timer Waveform Generation Mode
R
7
0
-
Configuration
NORMAL
DS_TB
Group
DS_B
R
DS_T
6
0
-
FRQ
SS
R
5
0
-
Table 14-4 on page
Mode of
operation
Normal
FRQ
Reserved
Single Slope
PWM
Reserved
Dual Slope PWM
Dual Slope PWM
Dual Slope PWM
R
4
0
-
CMPD
R/W
3
0
166.
Top
PER
CCA
-
PER
-
PER
PER
PER
CMPC
R/W
2
0
Update
TOP
TOP
-
BOTTOM
-
BOTTOM
BOTTOM
BOTTOM
CMPB
R/W
1
0
OVFIF/Event
TOP
TOP
-
BOTTOM
-
TOP
TOP and BOTTOM
BOTTOM
XMEGA A
CMPA
R/W
0
0
CTRLC
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