ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 314
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
Flash (kbytes)
64 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
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)
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A4U-AU
Manufacturer:
ON
Quantity:
29 000
Company:
Part Number:
ATxmega64A4U-U
Manufacturer:
ATMEL
Quantity:
74
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24.3
24.3.1
24.3.2
24.3.3
8331A–AVR–07/11
Registers Description
TXPLCTRL – Transmitter Pulse Length Control Register
RXPLCTRL – Receiver Pulse Length Control Register
CTRL – Control Register
• Bit 7:0 – TXPLCTRL[7:0]: Transmitter Pulse Length Control
This 8-bit value sets the pulse modulation scheme for the transmitter. Setting this register will
have no effect if IRCOM mode is not selected by a USART.
By leaving this register value to zero, 3/16 of the baud rate period pulse modulation is used.
Setting this value from 1 to 254 will give a fixed pulse length coding. The 8-bit value sets the
number of system clock periods for the pulse. The start of the pulse will be synchronized with the
rising edge of the baud rate clock.
Setting the value to 255 (0xFF) will disable pulse coding, letting the RX and TX signals pass
through the IRCOM module unaltered. This enables other features through the IRCOM module,
such as half-duplex USART, loop-back testing, and USART RX input from an event channel.
TXPCTRL must be configured before the USART transmitter is enabled (TXEN).
• Bit 7:0 – RXPLCTRL[7:0]: Receiver Pulse Length Control
This 8-bit value sets the filter coefficient for the IRCOM transceiver. Setting this register will have
no effect if IRCOM mode is not selected by a USART.
By leaving this register value at zero, filtering is disabled. Setting this value between 1 and 255
will enable filtering, where x+1 equal samples are required for the pulse to be accepted.
RXPCTRL must be configured before the USART receiver is enabled (RXEN).
• 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
+0x01
Read/Write
Initial Value
Bit
+0x02
Read/Write
Initial Value
Bit
+0x00
Read/Write
Initial Value
R/W
R/W
7
0
7
0
7
–
R
0
R/W
R/W
6
0
6
0
6
–
R
0
R/W
R/W
5
0
5
0
R
5
–
0
R/W
R/W
4
0
TXPLCTRL[7:0]
4
0
RXPLCTRL[7:0]
R
4
–
0
R/W
R/W
R/W
Atmel AVR XMEGA AU
3
0
3
0
3
0
R/W
R/W
R/W
2
0
2
0
2
0
EVSEL[3:0]
R/W
R/W
R/W
1
0
1
0
1
0
R/W
R/W
R/W
0
0
0
0
0
0
TXPLCTRL
RXPLCTRL
CTRL
314
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