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ATmega162 Folha de dados(PDF) 241 Page - ATMEL Corporation

Nome de Peças ATmega162
Descrição Electrónicos  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  324 Pages
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Fabricante Electrônico  ATMEL [ATMEL Corporation]
Página de início  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega162 Folha de dados(HTML) 241 Page - ATMEL Corporation

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2513K–AVR–07/09
ATmega162/V
Programming the
Fuse High Bits
The algorithm for programming the Fuse high bits is as follows (refer to “Programming the Flash”
on page 237 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.
Programming the
Extended Fuse Bits
The algorithm for programming the Extended Fuse bits is as follows (refer to “Programming the
Flash” on page 237 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 100. Programming the FUSES Waveforms
RDY/BSY
WR
OE
RESET +12V
PAGEL
0x40
DATA
DATA
XX
XA1
XA0
BS1
XTAL1
AC
0x40
DATA
XX
AC
Write Fuse Low byte
Write Fuse high byte
0x40
DATA
XX
AC
Write Extended Fuse byte
BS2



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