at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 249

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

22.2
7734M–AVR–03/10
Fuse Bits
Table 22-3.
Notes:
The AT90PWM81 has three Fuse bytes.
the fuses and how they are mapped into the Fuse bytes. Note that the fuses are read as logical zero, “0”, if
they are programmed.
Table 22-4.
Extended Fuse Byte
PSC2RB
PSC2RBA
PSCRRB
PSCRV
PSCINRB
BLB0 Mode
BLB1 Mode
1
2
3
4
1
2
3
4
1. Program the Fuse bits and Boot Lock bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed
Lock Bit Protection Modes
Extended Low Fuse Byte
BLB02
BLB12
1
1
0
0
1
1
0
0
BLB01
BLB11
Bit No
7
6
5
4
3
1
0
0
1
1
0
0
1
No restrictions for SPM or LPM accessing the Application section.
SPM is not allowed to write to the Application section.
SPM is not allowed to write to the Application section, and LPM
executing from the Boot Loader section is not allowed to read from the
Application section. If Interrupt Vectors are placed in the Boot Loader
section, interrupts are disabled while executing from the Application
section.
LPM executing from the Boot Loader section is not allowed to read
from the Application section. If Interrupt Vectors are placed in the
Boot Loader section, interrupts are disabled while executing from the
Application section.
No restrictions for SPM or LPM accessing the Boot Loader section.
SPM is not allowed to write to the Boot Loader section.
SPM is not allowed to write to the Boot Loader section, and LPM
executing from the Application section is not allowed to read from the
Boot Loader section. If Interrupt Vectors are placed in the Application
section, interrupts are disabled while executing from the Boot Loader
section.
LPM executing from the Application section is not allowed to read
from the Boot Loader section. If Interrupt Vectors are placed in the
Application section, interrupts are disabled while executing from the
Boot Loader section.
Table 22-4
Description
PSC2 Reset Behavior
PSC2 Reset Behavior for
OUT22 & 23
PSC Reduced Reset Behavior
PSCOUT & PSCOUTR Reset
Value
PSC & PSCR Inputs Reset
Behavior
(1)(2)
. Only ATmega88/168.
-
Table 22-6
describe briefly the functionality of all
Default Value
1
1
1
1
1
AT90PWM81
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