ATmega128A Atmel Corporation, ATmega128A Datasheet - Page 306

• Manufacturer Part Number: ATmega128A
• Manufacturer: Atmel Corporation

Specifications of ATmega128A

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

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
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