ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 227

• 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

19.10.6
8077H–AVR–12/09
ADDRMASK - TWI Slave Address Mask Register
Accessing the DATA register will clear the slave interrupt flags and the CLKHOLD flag.
• Bit 7:1 - ADDRMASK[7:1]: Read/Write Direction
These bits in the ADDRMASK register can act as a second address match register, or an
address mask register depending on the ADDREN setting.
If ADDREN is set to zero, ADDRMASK can be loaded with a 7-bit Slave Address mask. Each bit
in ADDRMASK can mask (disable) the corresponding address bit in the ADDR register. If the
mask bit is one the address match between the incoming address bit and the corresponding bit
in ADDR is ignored, i.e. masked bits will always match.
If ADDREN is set to one, ADDRMASK can be loaded with a second slave address in addition to
the ADDR register. In this mode, the slave will match on 2 unique addresses, one in ADDR and
the other in ADDRMASK.
• Bit 0- ADDREN: Address Enable
By default this bit is zero and the ADDRMASK bits acts as an address mask to the ADDR regis-
ter. If this bit is set to one, the slave address match logic responds to the 2 unique addresses in
ADDR and ADDRMASK.
Bit
+0x05
Read/Write
Initial Value
R/W
7
0
R/W
6
0
R/W
5
0
ADDRMASK[7:1]
R/W
4
0
R/W
3
0
R/W
2
0
R/W
1
0
XMEGA A
ADDREN
R/W
0
0
ADDRMASK
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