ATMEGA8L-8PJ Atmel, ATMEGA8L-8PJ Datasheet - Page 232
ATMEGA8L-8PJ
Manufacturer Part Number
ATMEGA8L-8PJ
Description
IC MCU AVR 8K 5V 8MHZ 28-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8L-8PJ
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
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)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Data Polling EEPROM
232
ATmega8(L)
When a new byte has been written and is being programmed into EEPROM, reading the
address location being programmed will give the value 0xFF. At the time the device is ready for
a new byte, the programmed value will read correctly. This is used to determine when the next
byte can be written. This will not work for the value 0xFF, but the user should have the following
in mind: As a chip-erased device contains 0xFF in all locations, programming of addresses that
are meant to contain 0xFF, can be skipped. This does not apply if the EEPROM is Re-pro-
grammed without chip-erasing the device. In this case, data polling cannot be used for the value
0xFF, and the user will have to wait at least t
Table 97
Table 97. Minimum Wait Delay Before Writing the Next Flash or EEPROM Location
Figure 113. Serial Programming Waveforms
Symbol
t
t
t
t
WD_FUSE
WD_FLASH
WD_EEPROM
WD_ERASE
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
for t
WD_EEPROM
SAMPLE
(MOSI)
(MISO)
(SCK)
value.
MSB
MSB
WD_EEPROM
Minimum Wait Delay
before programming the next byte. See
4.5ms
4.5ms
9.0ms
9.0ms
LSB
LSB
2486Z–AVR–02/11
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