ATMEGA8A-PU Atmel, ATMEGA8A-PU Datasheet - Page 227
![MCU AVR 8K FLASH 16MHZ 28-PDIP](/photos/7/21/72189/453-28-dip_sml.jpg)
ATMEGA8A-PU
Manufacturer Part Number
ATMEGA8A-PU
Description
MCU AVR 8K FLASH 16MHZ 28-PDIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8A-PU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Processor Series
ATMEGA8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
SPI, TWI, USART
Maximum Clock Frequency
16 MHz
Number Of Programmable I/os
23
Number Of Timers
3
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 6 Channel
Package
28PDIP
Device Core
AVR
Family Name
ATmega
Maximum Speed
16 MHz
Operating Supply Voltage
3.3|5 V
Controller Family/series
AVR MEGA
No. Of I/o's
23
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
16MHz
Rohs Compliant
Yes
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA8A-PU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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24.2
8159D–AVR–02/11
Fuse Bits
Table 24-2.
Notes:
The ATmega8A has two fuse bytes.
of all the fuses and how they are mapped into the fuse bytes. Note that the fuses are read as
logical zero, “0”, if they are programmed.
Table 24-3.
Notes:
RSTDISBL
WDTON
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
BLB1 Mode
Fuse High
Byte
1
2
3
4
(1)
1. Program the Fuse Bits before programming the Lock Bits.
2. “1” means unprogrammed, “0” means programmed
1. The SPIEN Fuse is not accessible in Serial Programming mode.
2. The CKOPT Fuse functionality depends on the setting of the CKSEL bits,
3. The default value of BOOTSZ1:0 results in maximum Boot Size. See
4. When programming the RSTDISBL Fuse Parallel Programming has to be used to change
(2)
Memory Lock Bits
(4)
on page 25
fuses or perform further programming.
Lock Bit Protection Modes
Fuse High Byte
BLB12
Bit No.
1
1
0
0
7
6
5
4
3
2
1
0
for details.
Description
Select if PC6 is I/O pin or RESET pin
WDT always on
Enable Serial Program and Data
Downloading
Oscillator options
EEPROM memory is preserved through
the Chip Erase
Select Boot Size (see
details)
Select Boot Size (see
details)
Select Reset Vector
BLB11
1
0
0
1
Table 24-3
Protection Type
No restrictions for SPM or LPM accessing the Boot Loader
section.
SPM is not allowed to write to the Boot Loader section.
SPM is not allowed to write to the Boot Loader section, and LPM
executing from the Application section is not allowed to read
from the Boot Loader section. If Interrupt Vectors are placed in
the Application section, interrupts are disabled while executing
from the Boot Loader section.
LPM executing from the Application section is not allowed to
read from the Boot Loader section. If Interrupt Vectors are
placed in the Application section, interrupts are disabled while
executing from the Boot Loader section.
(2)
(Continued)
Table 23-6
Table 23-6
and
Table 24-4
for
for
describe briefly the functionality
Default Value
1 (unprogrammed, PC6 is
RESET-pin)
1 (unprogrammed, WDT
enabled by WDTCR)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
0 (programmed)
0 (programmed)
1 (unprogrammed)
Table 23-6 on page
ATmega8A
see “Clock Sources”
(3)
(3)
223.
227
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