ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 251
![MCU AVR 256KB FLASH A3B 64-QFN](/photos/12/13/121326/313-64-qfn_sml.jpg)
ATXMEGA256A3B-MH
Manufacturer Part Number
ATXMEGA256A3B-MH
Description
MCU AVR 256KB FLASH A3B 64-QFN
Manufacturer
Atmel
Series
AVR® XMEGAr
Specifications of ATXMEGA256A3B-MH
Core Processor
AVR
Core Size
8/16-Bit
Speed
32MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
49
Program Memory Size
256KB (128K x 16)
Program Memory Type
FLASH
Eeprom Size
4K x 8
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.6 V ~ 3.6 V
Data Converters
A/D 16x12b; D/A 2x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-MLF®, 64-QFN
Processor Series
ATXMEGA256x
Core
AVR8
Data Bus Width
8 bit, 16 bit
Data Ram Size
16 KB
Interface Type
I2C, SPI, USART
Maximum Clock Frequency
32 MHz
Number Of Programmable I/os
49
Number Of Timers
7
Operating Supply Voltage
1.6 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 8 Channel
On-chip Dac
12 bit, 2 Channel
For Use With
ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATXMEGA256A3B-MU
ATXMEGA256A3B-MU
ATXMEGA256A3B-MU
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATXMEGA256A3B-MH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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21.15.3
21.15.4
8077H–AVR–12/09
CTRLA – USART Control Register A
CTRLB - USART Control Register B
• Bit 0 - RXB8: Receive Bit 8
RXB8 is the ninth data bit of the received character when operating with serial frames with nine
data bits. When used, this bit must be read before reading the low bits from DATA.
This bit unused in Master SPI mode of operation.
• Bit 7:6 - 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 5:4 - RXCINTLVL[1:0]: Receive Complete Interrupt Level
These bits enable the Receive Complete Interrupt and select the interrupt level as described in
Section 12. ”Interrupts and Programmable Multi-level Interrupt Controller” on page
enabled interrupt will be triggered when the RXCIF in the STATUS register is set.
• Bit 3:2 - TXCINTLVL[1:0]: Transmit Complete Interrupt Level
These bits enable the Transmit Complete Interrupt and select the interrupt level as described in
Section 12. ”Interrupts and Programmable Multi-level Interrupt Controller” on page
enabled interrupt will be triggered when the TXCIF in the STATUS register is set.
• Bit 1:0 - DREINTLVL[1:0]: USART Data Register Empty Interrupt Level
These bits enable the Data Register Empty Interrupt and select the interrupt level as described
in
enabled interrupt will be triggered when the DREIF in the STATUS register is set.
• Bit 7:5 - 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 4 - RXEN: Receiver Enable
Setting this bit enables the USART Receiver. The Receiver will override normal port operation
for the RxD pin when enabled. Disabling the Receiver will flush the receive buffer invalidating the
FERR, BUFOVF, and PERR flags.
Bit
+0x03
Read/Write
Initial Value
Bit
+0x04
Read/Write
Initial Value
Section 12. ”Interrupts and Programmable Multi-level Interrupt Controller” on page
R
R
7
0
7
0
-
-
R
R
6
0
6
0
-
-
R/W
R
5
RXCINTLVL[1:0]
0
5
0
-
RXEN
R/W
R/W
4
0
4
0
TXEN
R/W
R/W
3
TXCINTLVL[1:0]
0
3
0
CLK2X
R/W
R/W
2
0
2
0
MPCM
R/W
R/W
1
DREINTLVL[1:0]
0
1
0
XMEGA A
TXB8
R/W
R/W
0
0
0
0
123. The
123. The
123. The
CTRLA
CTRLB
251
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