Atmel ATmega32M1 Manual page 306

Atmel ATmega16/32/64/M1/C1
306
F. Repeat B through E until the entire buffer is filled or until all data within the page is loaded.
While the lower bits in the address are mapped to words within the page, the higher bits address
the pages within the FLASH. This is illustrated in
eight bits are required to address words in the page (pagesize < 256), the most significant bit(s)
in the address low byte are used to address the page when performing a Page Write.
G. Load Address High byte
1. Set XA1, XA0 to "00". This enables address loading.
2. Set BS1 to "1". This selects high address.
3. Set DATA = Address high byte (0x00 - 0xFF).
4. Give XTAL1 a positive pulse. This loads the address high byte.
H. Program Page
1. Give WR a negative pulse. This starts programming of the entire page of data.
RDY/BSY goes low.
2. Wait until RDY/BSY goes high (See
I. Repeat B through H until the entire Flash is programmed or until all data has been
programmed.
J. End Page Programming
1. 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.
Figure 25-2. Addressing the Flash Which is Organized in Pages
PROGRAM
COUNTER
PAGE ADDRESS
WITHIN THE FLASH
PROGRAM MEMORY
PAGE
Note: 1. PCPAGE and PCWORD are listed in
Figure 25-3
PCMSB
PAGEMSB
PCPAGE PCWORD
Table 25-12 on page
Figure 25-2 on page 306. Note that if less than
for signal waveforms).
(1)
WORD ADDRESS
WITHIN A PAGE
PAGE
INSTRUCTION WORD
303.
PCWORD[PAGEMSB:0]:
00
01
02
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