ATMEGA128A-ANR Atmel, ATMEGA128A-ANR Datasheet - Page 306

• Manufacturer Part Number: ATMEGA128A-ANR
• Description: IC MCU AVR 128K FLASH 64TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA128A-ANR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 128KB (64K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 4K 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: 64-TQFP
• Core: AVR8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.8.3
8151H–AVR–02/11
Data Polling EEPROM
this value, the user will have to wait for at least t
a chip-erased device contains $FF in all locations, programming of addresses that are meant to
contain $FF, can be skipped. See
When a new byte has been written and is being programmed into EEPROM, reading the
address location being programmed will give the value $FF. 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 $FF, but the user should have the following in
mind: As a chip-erased device contains $FF in all locations, programming of addresses that are
meant to contain $FF, can be skipped. This does not apply if the EEPROM is re-programmed
without chip-erasing the device. In this case, data polling cannot be used for the value $FF, and
the user will have to wait at least t
for t
Table 26-14. Minimum Wait Delay before Writing the Next Flash or EEPROM Location, V
Figure 26-8. .SPI Serial Programming Waveforms
Symbol
t
t
t
t
WD_FUSE
WD_FLASH
WD_EEPROM
WD_ERASE
WD_EEPROM
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
SERIAL DATA INPUT
5V ±10%
value.
SAMPLE
(MOSI)
(MISO)
(SCK)
WD_EEPROM
Table 26-14
Minimum Wait Delay
4.5ms
5ms
10ms
10ms
MSB
MSB
before programming the next byte. See
for t
WD_FLASH
WD_FLASH
before programming the next page. As
value
ATmega128A
LSB
LSB
Table 26-14
CC
306
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