AT90PWM2B-16SU 데이터 시트보기 (PDF) - Atmel Corporation

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AT90PWM2B-16SU

8-bit Atmel Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

AT90PWM2/3/2B/3B

Table 25-3. Lock Bit Protection Modes(1)(2).

BLB0 Mode BLB02 BLB01

1

1

1

No restrictions for SPM or LPM accessing the Application

section.

2

1

0

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

3

0

0

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

4

0

1

read from the Application section. If Interrupt Vectors are placed

in the Boot Loader section, interrupts are disabled while

executing from the Application section.

BLB1 Mode BLB12 BLB11

1

1

1

No restrictions for SPM or LPM accessing the Boot Loader

section.

2

1

0

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

3

0

0

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

4

0

1

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.

Notes: 1. Program the Fuse bits and Boot Lock bits before programming the LB1 and LB2.

2. “1” means unprogrammed, “0” means programmed

4317K–AVR–03/2013

281

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