Atmel AT90PWM2 Manual page 277

24.7.13 Boot Loader Parameters
AT90PWM2/3/2B/3B
278
Do_spm:
; check for previous SPM complete
Wait_spm:
in temp1, SPMCSR
sbrc temp1, SPMEN
rjmp Wait_spm
; input: spmcrval determines SPM action
; disable interrupts if enabled, store status
in temp2, SREG
cli
; check that no EEPROM write access is present
Wait_ee:
sbic EECR, EEPE
rjmp Wait_ee
; SPM timed sequence
out SPMCSR, spmcrval
spm
; restore SREG (to enable interrupts if originally enabled)
out SREG, temp2
ret
In Table 24-6 through Table
ming are given.
Table 24-6. Boot Size Configuration
BOOTSZ1 BOOTSZ0
1 1
1 0
0 1
0 0
Note: The different BOOTSZ Fuse configurations are shown in
Table 24-7. Read-While-Write Limit
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
24-8, the parameters used in the description of the self program-
Application
Boot Flash
Size Pages Section
128 0x000 -
4
words 0xF7F
256 0x000 -
8
words 0xEFF
512 0x000 -
16
words 0xDFF
1024 0x000 -
32
words 0xBFF
Boot
Loader End
Flash Application
Section Section
0xF80 -
0xF7F
0xFFF
0xF00 -
0xEFF
0xFFF
0xE00 -
0xDFF
0xFFF
0xC00 -
0xBFF
0xFFF
Figure 24-2.
Pages Address
96 0x000 - 0xBFF
32 0xC00 - 0xFFF
Boot Reset
Address
(Start Boot
Loader
Section)
0xF80
0xF00
0xE00
0xC00
4317I–AVR–01/08