ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 239

• Manufacturer Part Number: ATMEGA8U2-AUR
• Description: MCU AVR 8K FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8U2-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

23.8.14
In
Table 23-8.
(Page size = 64 words = 128 bytes)
Note:
Table 23-9.
Note:
Table 23-10. Explanation of different variables used in
Note:
See
Programming.
7799D–AVR–11/10
1
1
0
0
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 23-8
“Addressing the Flash During Self-Programming” on page 232
1
0
1
0
1. The different BOOTSZ Fuse configurations are shown in
1. For details about these two section, see
1. Z0: should be zero for all SPM commands, byte select for the (E)LPM instruction.
ATmega8U2 Boot Loader Parameters
Write Section” on page
256 words
512 words
1024 words
2048 words
through
Boot Size Configuration
Read-While-Write Limit
Table
PC[12:6]
PC[5:0]
12
23-10, the parameters used in the description of the Self-Programming are given.
5
4
8
16
32
227.
(1)
(1)
(Word Addresses)
0x0000 - 0xEFF
0x0000 - 0xDFF
0x0000 - 0xBFF
0x0000 - 0x7FF
Corresponding
“NRWW – No Read-While-Write Section” on page 227
Z-value
Z13:Z7
Z6:Z1
Z13
Z6
Figure 23-4
Figure
0xF00 - 0xFFF
0xE00 - 0xFFF
0xC00 - 0xFFF
0x800 - 0xFFF
Description
Most significant bit in the Program Counter. (The Program
Counter is 13 bits PC[12:0])
Most significant bit which is used to address the words within
one page (64 words in a page requires six bits PC [5:0]).
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not
used, the ZPCMSB equals PCMSB + 1.
Bit in Z-pointer that is mapped to PCMSB. Because Z0 is not
used, the ZPAGEMSB equals PAGEMSB + 1.
Program Counter page address: Page select, for Page Erase
and Page Write
Program Counter word address: Word select, for filling
temporary buffer (must be zero during Page Write operation)
and the mapping to the Z-pointer
23-2.
for details about the use of Z-pointer during Self-
Pages
(1)
32
32
ATmega8U2/16U2/32U2
0xEFF
0xDFF
0xBFF
0x7FF
Address
0x0000 - 0x07FF
0x0800 - 0x0FFF
and
“RWW – Read-While-
0xF00
0xE00
0xC00
0x800
239