atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 286

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

23.7.14
286
ATmega32/64/M1/C1
ATmega32/64/M1/C1 - 32K -Flash Boot Loader Parameters
In
ming are given.
Table 23-7.
Note:
Table 23-8.
For details about these two section, see
and
Table 23-9.
Note:
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Variable
PCMSB
PAGEMSB
ZPCMSB
ZPAGEMSB
PCPAGE
PCWORD
Table 23-7
“RWW – Read-While-Write Section” on page 274
1
1
0
0
1. The different BOOTSZ Fuse configurations are shown in
2. 1 word equals 2 bytes.
Z15:Z13: always ignored
Z0: should be zero for all SPM commands, byte select for the LPM instruction.
BOOTSZ0
through
Boot Size Configuration, ATmega32/64/M1/C1 (32K product)
Read-While-Write Limit
Explanation of Different Variables used in
pointer
PC[13:6]
PC[5:0]
1
0
1
0
13
5
Table
Boot
Size
256
words
512
words
1024
words
2048
words
Corresponding
23-9, the parameters used in the description of the self program-
(2)
Z-value
Z14:Z7
Z6:Z1
Pages
Z14
Z6
16
32
4
8
(Note:)
“NRWW – No Read-While-Write Section” on page 274
Application
Flash
Section
0x0000 -
0x3EFF
0x0000 -
0x3DFF
0x0000 -
0x3BFF
0x0000 -
0x37FF
Description
Most significant bit in the Program Counter. (The Program
Counter is 14 bits PC[13:0])
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)
Figure 23-3
Boot
Loader
Flash
Section
0x3F00 -
0x3FFF
0x3E00 -
0x3FFF
0x3C00 -
0x3FFF
0x3800 -
0x3FFF
Pages
224
Figure
32
End
Application
Section
0x3EFF
0x3DFF
0x3BFF
0x37FF
and the Mapping to the Z-
23-2.
Address
0x0000 - 0x37FF
0x3800 - 0x3FFF
7647A–AVR–02/08
Boot Reset
Address
(Start Boot
Loader
Section)
0x3F00
0x3E00
0x3C00
0x3800