ATMEGA8A-AUR Atmel, ATMEGA8A-AUR Datasheet - Page 234
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ATMEGA8A-AUR
Manufacturer Part Number
ATMEGA8A-AUR
Description
MCU AVR 8KB FLASH 16MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8A-MU.pdf
(308 pages)
Specifications of ATMEGA8A-AUR
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 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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24.7.5
8159D–AVR–02/11
Programming the EEPROM
Table 24-12. Programming the Flash Waveforms
Note:
The EEPROM is organized in pages, see
EEPROM, the program data is latched into a page buffer. This allows one page of data to be
programmed simultaneously. The programming algorithm for the EEPROM Data memory is as
follows (refer to
Data loading):
K: Repeat 3 through 5 until the entire buffer is filled.
L: Program EEPROM page.
1. A: Load Command “0001 0001”.
2. G: Load Address High byte (0x00 - 0xFF).
3. B: Load Address Low byte (0x00 - 0xFF).
4. C: Load Data (0x00 - 0xFF).
5. E: Latch data (give PAGEL a positive pulse).
1. Set BS1 to “0”.
2. Give WR a negative pulse. This starts programming of the EEPROM page. RDY/BSY
3. Wait until to RDY/BSY goes high before programming the next page.
RESET +12V
goes low.
(See
RDY/BSY
1. “XX” is don’t care. The letters refer to the programming description above.
PAGEL
XTAL1
DATA
XA1
XA0
BS1
BS2
WR
OE
Figure 24-2
“Programming the Flash” on page 232
0x10
A
ADDR. LOW
for signal waveforms).
B
DATA LOW
C
DATA HIGH
D
E
XX
ADDR. LOW
Table 24-6 on page
B
(1)
DATA LOW
C
F
DATA HIGH
for details on Command, Address and
D
E
XX
229. When programming the
ADDR. HIGH
G
ATmega8A
H
XX
234
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