Datasheet

222
ATmega8A [DATASHEET]
8159E–AVR–02/2013
programmed 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
WD_EEPROM
before programming the next byte. See Table 25-15 for t
WD_EEPROM
value.
Figure 25-8. Serial Programming Waveforms
Table 25-15. Minimum Wait Delay Before Writing the Next Flash or EEPROM Location
Symbol Minimum Wait Delay
t
WD_FUSE
4.5 ms
t
WD_FLASH
4.5 ms
t
WD_EEPROM
9.0 ms
t
WD_ERASE
9.0 ms
MSB
MSB
LSB
LSB
SERIAL CLOCK INPUT
(SCK)
SERIAL DATA INPUT
(MOSI)
(MISO)
SAMPLE
SERIAL DATA OUTPUT