ATxmega32A4 Atmel Corporation, ATxmega32A4 Datasheet - Page 322

• Manufacturer Part Number: ATxmega32A4
• Manufacturer: Atmel Corporation

Specifications of ATxmega32A4

• Flash (kbytes): 32 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 34
• Ext Interrupts: 34
• Usb Speed: No
• Usb Interface: No
• Spi: 7
• Twi (i2c): 2
• Uart: 5
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 12
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 1024
• 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: 5
• Output Compare Channels: 16
• Input Capture Channels: 16
• Pwm Channels: 16
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

26.10.4
26.10.5
8077H–AVR–12/09
EVCTRL – DAC Event Control Register
TIMCTRL – DAC Timing Control Register
• Bit 0 - LEFTADJ: DAC Left-Adjust Value
If this bit is set, CH0DATA and CH1DATA are left-adjusted.
• Bits 7:3 - 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.
• Bits 2:1 - EVSEL[2:0]: DAC Event Channel Input Selection
These bits define which channel from the Event System that is used for triggering a DAC
conversion.
Table 26-3
Table 26-3.
• Bit 7 - 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.
• Bits 6:4 - [2:0]: - CONINTVAL - DAC Conversion Interval
These bits control the minimum interval between two successive conversions. The interval must
be set relative to the Peripheral clock (clk
the result from the previous conversion has settled. The DAC Conversion Interval should never
be set lower than 1 µs during single channel operation, and not lower than 1.5 µs during dual
channel (S/H) operation.
Bit
+0x04
Read/Write
Initial Value
Bit
+0x03
Read/Write
Initial Value
EVSEL[2:0]
000
001
010
011
100
101
110
111
shows the available selections.
R
7
0
R
-
7
0
-
DAC Event input Selection
R/W
6
1
R
6
0
-
Group Configuration
CONINTVAL[2:0]
R/W
R
5
1
5
0
-
0
1
2
3
4
5
6
7
PER
R/W
R
4
0
4
0
-
) to ensure that a new conversion is not started until
Description
Event channel 0 as input to DAC
Event channel 1 as input to DAC
Event channel 2 as input to DAC
Event channel 3 as input to DAC
Event channel 4 as input to DAC
Event channel 5 as input to DAC
Event channel 6 as input to DAC
Event channel 7 as input to DAC
R/W
R
3
0
3
0
-
R/W
R/W
2
0
2
0
REFRESH[3:0]
EVSEL[2:0]
R/W
R/W
1
0
1
0
XMEGA A
R/W
R/W
0
0
0
1
TIMCTRL
EVCTRL
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