ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 396

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• 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: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• 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

30.9
30.9.1
8331A–AVR–07/11
Register Description
ACnCTRL – Analog Comparator n Control Register
• Bit 7:6 – INTMODE[1:0]: Interrupt Modes
These bits configure the interrupt mode for the Analog Comparator according to
Table 30-1.
• Bit 5:4 – INTLVL[1:0]: Interrupt Level
These bits enable the Analog Comparator Interrupt and select the interrupt level as described in
”Interrupts and Programmable Multilevel Interrupt Controller” on page
will trigger according to the INTMODE setting.
• Bit 3 – HSMODE: High-Speed Mode Select
By default the Analog Comparator is in Low-power mode and this bit is zero. Setting this bit
selects high-speed mode for shorter propagation delay. For details on actual performance refer
to device data sheet.
• Bit 2:1 – HYSMODE[1:0]: Hysteresis Mode Select
These bits select hysteresis according to
to device data sheet.
Table 30-2.
• Bit 0 - ENABLE: Enable
Setting this bit enables the Analog Comparator.
Bit
+0x00 / +0x01
Read/Write
Initial Value
HYSMODE[1:0]
INTMODE[1:0]
00
01
10
11
00
01
10
11
R/W
Hysteresis Settings
7
0
Interrupt Settings
INTMODE[1:0]
BOTHEDGES
–
FALLING
RISING
NO
SMALL
LARGE
–
Group Configuration
Group Configuration
R/W
6
0
R/W
5
0
INTLVL[1:0]
Table
R/W
4
0
Comparator interrupt on output toggle
Comparator interrupt or event on falling output edge
Comparator interrupt or event on rising output edge
Description
Large hysteresis
Description
Reserved
No hysteresis
Small hysteresis
Reserved
30-2. For details on actual hysteresis levels refer
HSMODE
Atmel AVR XMEGA AU
R/W
3
0
R/W
2
0
HYSMODE[2:0]
132. The enabled interrupt
R/W
1
0
ENABLE
R/W
Table
0
0
30-1.
ACnCTRL
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