Datasheet

214
ATmega8A [DATASHEET]
8159E–AVR–02/2013
H. Program Page
1. Set BS1 = “0”
2. Give WR
a negative pulse. This starts programming of the entire page of data. RDY/BSY goes low.
3. Wait until RDY/BSY
goes high. (See Figure 25-12 for signal waveforms)
I. Repeat B through H until the entire Flash is programmed or until all data has been programmed.
J. End Page Programming
1. Set XA1, XA0 to “10”. This enables command loading.
2. Set DATA to “0000 0000”. This is the command for No Operation.
3. Give XTAL1 a positive pulse. This loads the command, and the internal write signals are reset.
Table 25-11. Addressing the Flash which is Organized in Pages
(1)
Note: 1. PCPAGE and PCWORD are listed in Table 25-5 on page 210.
PROGRAM MEMORY
WORD ADDRESS
WITHIN A PAGE
PAGE ADDRESS
WITHIN THE FLASH
INSTRUCTION WORD
PAGE
PCWORD[PAGEMSB:0]:
00
01
02
PAGEEND
PAGE
PCWORDPCPAGE
PCMSB
PAGEMSB
PROGRAM
COUNTER