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ATmega88 Datasheet(PDF) 276 Page - ATMEL Corporation

Part # ATmega88
Description  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  340 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega88 Datasheet(HTML) 276 Page - ATMEL Corporation

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276
7530H–AVR–02/09
ATmega48/88/168 Automotive
24.7.13
ATmega88 Boot Loader Parameters
In Table 24-6 through Table 24-8, the parameters used in the description of the self program-
ming are given.
Note:
The different BOOTSZ Fuse configurations are shown in Figure 24-2.
For details about these two section, see “NRWW – No Read-While-Write Section” on page 264
and “RWW – Read-While-Write Section” on page 264
Table 24-6.
Boot Size Configuration, ATmega88
BOOTSZ1
BOOTSZ0
Boot
Size
Pages
Application
Flash
Section
Boot
Loader
Flash
Section
End
Application
Section
Boot Reset
Address
(Start Boot
Loader
Section)
11
128
words
4
0x000 -
0xF7F
0xF80 -
0xFFF
0xF7F
0xF80
10
256
words
8
0x000 -
0xEFF
0xF00 -
0xFFF
0xEFF
0xF00
01
512
words
16
0x000 -
0xDFF
0xE00 -
0xFFF
0xDFF
0xE00
00
1024
words
32
0x000 -
0xBFF
0xC00 -
0xFFF
0xBFF
0xC00
Table 24-7.
Read-While-Write Limit, ATmega88
Section
Pages
Address
Read-While-Write section (RWW)
96
0x000 - 0xBFF
No Read-While-Write section (NRWW)
32
0xC00 - 0xFFF
Table 24-8.
Explanation of Different Variables used in Figure 24-3 and the Mapping to the
Z-pointer, ATmega88
Variable
Corresponding
Z-value(1)
Description
PCMSB
11
Most significant bit in the Program Counter. (The
Program Counter is 12 bits PC[11:0])
PAGEMSB
4
Most significant bit which is used to address the
words within one page (32 words in a page requires
5 bits PC [4:0]).
ZPCMSB
Z12
Bit in Z-register that is mapped to PCMSB. Because
Z0 is not used, the ZPCMSB equals PCMSB + 1.
ZPAGEMSB
Z5
Bit in Z-register that is mapped to PAGEMSB.
Because Z0 is not used, the ZPAGEMSB equals
PAGEMSB + 1.
PCPAGE
PC[11:5]
Z12:Z6
Program counter page address: Page select, for
page erase and page write
PCWORD
PC[4:0]
Z5:Z1
Program counter word address: Word select, for
filling temporary buffer (must be zero during page
write operation)



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