Rainbow-electronics ATmega64M1 Manual do Utilizador descarregar pdf (Página 301)

301

8209A–AVR–08/09

ATmega16M1/32M1/64M1

28.9.8 Programming the Fuse Low Bits

The algorithm for programming the Fuse Low bits is as follows (refer to “Programming the Flash”

on page 297 for details on Command and Data loading):

1. A: Load Command “0100 0000”.

2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.

3. Give WR

a negative pulse and wait for RDY/BSY to go high.

28.9.9 Programming the Fuse High Bits

The algorithm for programming the Fuse High bits is as follows (refer to “Programming the

Flash” on page 297 for details on Command and Data loading):

1. A: Load Command “0100 0000”.

2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.

3. Set BS1 to “1” and BS2 to “0”. This selects high data byte.

4. Give WR

a negative pulse and wait for RDY/BSY to go high.

5. Set BS1 to “0”. This selects low data byte.

28.9.10 Programming the Extended Fuse Bits

The algorithm for programming the Extended Fuse bits is as follows (refer to “Programming the

Flash” on page 297 for details on Command and Data loading):

1. 1. A: Load Command “0100 0000”.

2. 2. C: Load Data Low Byte. Bit n = “0” programs and bit n = “1” erases the Fuse bit.

3. 3. Set BS1 to “0” and BS2 to “1”. This selects extended data byte.

4. 4. Give WR

a negative pulse and wait for RDY/BSY to go high.

5. 5. Set BS2 to “0”. This selects low data byte.

Figure 28-5. Programming the FUSES Waveforms

28.9.11 Programming the Lock Bits

The algorithm for programming the Lock bits is as follows (refer to “Programming the Flash” on

page 297 for details on Command and Data loading):

RDY/BSY

RESET +12V

PAGEL

0x40

DATA

DATA XX

XA1

XA0

BS1

XTAL1

0x40 DATA XX

Write Fuse Low byte Write Fuse high byte

0x40 DATA XX

Write Extended Fuse byte

BS2

1 2 ... 296 297 298 299 300 301 302 303 304 305 306 ... 342 343

Comentários a estes Manuais

Sem comentários

Rainbow-electronics ATmega64M1 Manual do Utilizador Página 301

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics ATmega64M1