ATXMEGA256A3-MU Atmel, ATXMEGA256A3-MU Datasheet - Page 14

• Manufacturer Part Number: ATXMEGA256A3-MU
• Description: 8-bit Microcontrollers - MCU 8/16 bit 1.6V-3.6V 256KB + 8KB
• Manufacturer: Atmel

Specifications of ATXMEGA256A3-MU

• Product Category: 8-bit Microcontrollers - MCU
• Rohs: yes
• Core: AVR
• Data Bus Width: 8 bit/16 bit
• Maximum Clock Frequency: 32 MHz
• Program Memory Size: 256 KB
• Data Ram Size: 16 KB
• On-chip Adc: Yes
• Package / Case: QFN EP
• Mounting Style: SMD/SMT
• A/d Bit Size: 12 bit
• A/d Channels Available: 8
• Data Rom Size: 4 KB
• Interface Type: I2C, SPI, USART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Number Of Programmable I/os: 50
• Number Of Timers: 7
• Processor Series: ATXMega
• Program Memory Type: Flash
• Factory Pack Quantity: 260
• Supply Voltage - Max: 3.6 V
• Supply Voltage - Min: 1.6 V

7.7
8068T–AVR–12/10
ATxmega64A3
ATxmega128A3
ATxmega192A3
ATxmega256A3
ATxmega64A3
ATxmega128A3
ATxmega192A3
ATxmega256A3
Devices
Devices
Flash and EEPROM Page Size
128 KB + 8 KB
192 KB + 8 KB
256 KB + 8 KB
64 KB + 4 KB
Flash
Size
EEPROM
The Flash Program Memory and EEPROM data memory are organized in pages. The pages are
word accessible for the Flash and byte accessible for the EEPROM.
Table 7-2 on page 14
operations are performed on one page at a time, while reading the Flash is done one byte at a
time. For Flash access the Z-pointer (Z[m:n]) is used for addressing. The most significant bits in
the address (FPAGE) gives the page number and the least significant address bits (FWORD)
gives the word in the page.
Table 7-2.
Table 7-3 on page 14
EEEPROM write and erase operations can be performed one page or one byte at a time, while
reading the EEPROM is done one byte at a time. For EEPROM access the NVM Address Regis-
ter (ADDR[m:n]) is used for addressing. The most significant bits in the address (E2PAGE) gives
the page number and the least significant address bits (E2BYTE) gives the byte in the page.
Table 7-3.
Size
2 KB
2 KB
2 KB
4 KB
Page Size
(words)
128
256
256
256
Number of words and Pages in the Flash.
Number of bytes and Pages in the EEPROM.
Page Size
FWORD
(Bytes)
Z[7:1]
Z[8:1]
Z[8:1]
Z[8:1]
shows the Flash Program Memory organization. Flash write and erase
32
32
32
32
shows EEPROM memory organization for the XMEGA A3 devices.
FPAGE
Z[16:8]
Z[17:9]
Z[18:9]
Z[18:9]
ADDR[4:0]
ADDR[4:0]
ADDR[4:0]
ADDR[4:0]
E2BYTE
128K
192K
256K
Size
64K
Application
No of Pages
ADDR[10:5]
ADDR[10:5]
ADDR[10:5]
ADDR[11:5]
E2PAGE
256
256
384
512
Size
4 KB
8 KB
8 KB
8 KB
XMEGA A3
No of Pages
Boot
No of Pages
128
64
64
64
16
16
16
16
14