ATmega88PA Automotive Atmel Corporation, ATmega88PA Automotive Datasheet - Page 291

• Manufacturer Part Number: ATmega88PA Automotive
• Manufacturer: Atmel Corporation

27.8.15
Table 27-10. Boot Size Configuration, Atmel ATmega168PA
Table 27-11. Read-While-Write Limit, Atmel ATmega168PA
Table 27-12. Explanation of Different Variables used in
9223B–AVR–09/11
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Note:
1
1
0
0
1. Z15:Z14: always ignored
Atmel ATmega168PA Boot Loader Parameters
BOOTSZ0
Z0: should be zero for all SPM commands, byte select for the LPM instruction.
See
Self-Programming.
ATmega168PA
“Addressing the Flash During Self-Programming” on page 282
1
0
1
0
Boot
Size
128 words
256 words
512 words
1024 words
PC[12:6]
PC[5:0]
In
gramming are given.
Note:
For details about these two section, see
278
12
5
Table 27-10
Atmel ATmega48PA/88PA/168PA [Preliminary]
and
Pages
The different BOOTSZ Fuse configurations are shown in
“RWW – Read-While-Write Section” on page 278
16
2
4
8
Corresponding
Application
Flash
Section
0x0000 - 0x1F7F
0x0000 - 0x1EFF
0x0000 - 0x1DFF
0x0000 - 0x1BFF
through
Z-value
Z13:Z7
Z6:Z1
Z13
Z6
(1)
Table
Figure 27-3
27-12, the parameters used in the description of the self pro-
Description
Most significant bit in the Program Counter. (The Program Counter is
13 bits PC[12:0])
Most significant bit which is used to address the words within
one page (64 words in a page requires 6 bits PC [5:0])
Bit in Z-register that is mapped to PCMSB. Because Z0 is not used,
the ZPCMSB equals PCMSB + 1.
Bit in Z-register that is mapped to PAGEMSB. Because Z0 is not
used, the ZPAGEMSB equals PAGEMSB + 1.
Program counter page address: Page select, for page erase and
page write
Program counter word address: Word select, for filling temporary
buffer (must be zero during page write operation)
Boot
Loader
Flash
Section
0x1F80 - 0x1FFF
0x1F00 - 0x1FFF
0x1E00 - 0x1FFF
0x1C00 - 0x1FFF
Pages
112
16
and the Mapping to the Z-pointer, Atmel
“NRWW – No Read-While-Write Section” on page
for details about the use of Z-pointer during
End
Application
Section
0x1F7F
0x1EFF
0x1DFF
0x1BFF
Address
0x0000 - 0x1BFF
0x1C00 - 0x1FFF
Figure 27-2 on page
Boot Reset Address (Start Boot
Loader Section)
0x1F80
0x1F00
0x1E00
0x1C00
280.
291