at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 246

• Manufacturer Part Number: at90pwm81-16se
• Description: 8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
• Manufacturer: ATMEL Corporation

21.7.14
246
AT90PWM81
Boot Loader Parameters
In
given.
Table 21-7.
Note:
Table 21-8.
BOOTSZ1
Section
Read-While-Write section (RWW)
No Read-While-Write section (NRWW)
Table 21-7
Do_spm:
Wait_spm:
Wait_ee:
1
1
0
0
rjmp Return
; check for previous SPM complete
in
sbrc temp1, SPMEN
rjmp Wait_spm
; input: spmcrval determines SPM action
; disable interrupts if enabled, store status
in
cli
; check that no EEPROM write access is present
sbic EECR, EEPE
rjmp Wait_ee
; SPM timed sequence
out
spm
; restore SREG (to enable interrupts if originally enabled)
out
ret
The different BOOTSZ Fuse configurations are shown in
temp1, SPMCSR
temp2, SREG
SPMCSR, spmcrval
SREG, temp2
through
BOOTSZ0
Boot Size Configuration
Read-While-Write Limit
1
0
1
0
Table
Boot
Size
128
words
256
words
512
words
1024
words
21-9, the parameters used in the description of the self programming are
Pages
16
32
4
8
Application
Flash
Section
0x000 - 0xF7F
0x000 - 0xEFF
0x000 - 0xDFF
0x000 - 0xBFF
Figure
Boot
Loader
Flash
Section
0xF80 -
0xFFF
0xF00 -
0xFFF
0xE00 -
0xFFF
0xC00 -
0xFFF
21-2.
Pages
96
32
End
Application
Section
0xF7F
0xEFF
0xDFF
0xBFF
Address
0x000 - 0xBFF
0xC00 - 0xFFF
Boot Reset
Address (Start
Boot Loader
Section)
0xF80
0xF00
0xE00
0xC00
7734M–AVR–03/10