ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 262

• 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: -

Table 25-16. Serial Programming Instruction Set
7799D–AVR–11/10
Instruction
Programming Enable
Chip Erase
Load Extended Address Byte
Read Program Memory
Load Program Memory Page
Write Program Memory Page
Read EEPROM Memory
Write EEPROM Memory
Load EEPROM Memory
Page (page access)
Write EEPROM Memory
Page (page access)
Read Lock bits
Write Lock bits
Read Signature Byte
Write Fuse bits
Write Fuse High bits
Write Extended Fuse Bits
Read Fuse bits
Read Fuse High bits
1010 1100
1010 1100
0100 1101
0010 H000
0100 H000
0100 1100
1010 0000
1100 0000
1100 0001
1100 0010
0101 1000
1010 1100
0011 0000
1010 1100
1010 1100
1010 1100
0101 0000
0101 1000
Byte 1
0101 0011
100x xxxx
0000 0000
aaaa aaaa
xxxx xxxx
aaaa aaaa
0000 aaaa
0000 aaaa
0000 0000
0000 aaaa
0000 0000
111x xxxx
000x xxxx
1010 0000
1010 1000
1010 0100
0000 0000
0000 1000
Byte 2
Instruction Format
xxxx xxxx
xxxx xxxx
cccc cccc
bbbb bbbb
xxbb bbbb
bbxx xxxx
bbbb bbbb
bbbb bbbb
0000 00bb
bbbb bb00
xxxx xxxx
xxxx xxxx
xxxx xxbb
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
xxxx xxxx
Byte 3
xxxx xxxx
xxxx xxxx
xxxx xxxx
oooo oooo
iiii iiii
xxxx xxxx
oooo oooo
iiii iiii
iiii iiii
xxxx xxxx
xxoo oooo
11ii iiii
oooo oooo
iiii iiii
iiii iiii
iiii iiii
oooo oooo
oooo oooo
Byte4
ATmega8U2/16U2/32U2
Operation
Enable Serial Programming after
RESET goes low.
Chip Erase EEPROM and Flash.
Defines Extended Address Byte for
Read Program Memory and Write
Program Memory Page.
Read H (high or low) data o from
Program memory at word address
c:a:b.
Write H (high or low) data i to Program
Memory page at word address b. Data
low byte must be loaded before Data
high byte is applied within the same
address.
Write Program Memory Page at
address c:a:b.
Read data o from EEPROM memory at
address a:b.
Write data i to EEPROM memory at
address a:b.
Load data i to EEPROM memory page
buffer. After data is loaded, program
EEPROM page.
Write EEPROM page at address a:b.
Read Lock bits. “0” = programmed, “1”
= unprogrammed. See
page 246
Write Lock bits. Set bits = “0” to
program Lock bits. See
page 246
Read Signature Byte o at address b.
Set bits = “0” to program, “1” to
unprogram.
Set bits = “0” to program, “1” to
unprogram.
Set bits = “0” to program, “1” to
unprogram. See
247
Read Fuse bits. “0” = programmed, “1”
= unprogrammed.
Read Fuse High bits. “0” = pro-
grammed, “1” = unprogrammed.
for details.
for details.
for details.
Table 25-3 on page
Table 25-1 on
Table 25-1 on
262