ATxmega256A3 Atmel Corporation, ATxmega256A3 Datasheet - Page 333
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ATxmega256A3
Manufacturer Part Number
ATxmega256A3
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega256A3
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 Speed
No
Usb Interface
No
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
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27.9.3
27.9.4
8077H–AVR–12/09
CTRLA – Control Register A
CTRLB – Control Register B
Table 27-3.
• Bits 2:0 - MUXNEG[2:0]: Analog Comparator Negative Input MUX Selection
These bits select which input to be connected to the negative input of Analog Comparator n,
according to
Table 27-4.
• Bits 7:1 - 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 0 – AC0OUT: Analog Comparator Output
Setting this bit makes the output of Analog Comparator 0 available on pin 7 on the same port.
• Bits 7:6 - Res - 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
+0x05
Read/Write
Initial Value
Bit
+0x04
Read/Write
Initial Value
MUXNEG[2:0]
101
110
111
000
001
010
011
100
101
110
111
Table 27-4 on page
R/W
R
7
0
7
0
-
-
Analog Comparator n Positive Input MUX Selection (Continued)
Analog Comparator n Negative Input MUX Selection
Group Configuration
R/W
R
6
0
6
0
-
-
BANDGAP
SCALER
PIN5
PIN6
PIN0
PIN1
PIN3
PIN5
PIN7
DAC
DAC
R/W
333.
R
5
0
5
0
-
R/W
R
4
0
4
0
-
R/W
R
3
0
3
0
SCALEFAC[5:0]
-
Negative Input MUX Selection
Internal Bandgap Voltage
VCC Voltage Scaler
R/W
R
2
0
2
0
-
DAC Output
DAC Output
Pin 5
Pin 6
Pin 0
Pin 1
Pin 3
Pin 5
Pin 7
R/W
R
1
0
1
0
-
XMEGA A
AC0OUT
R/W
R/W
0
0
0
0
CTRLA
CTRLB
333