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ATmega32HVB 데이터시트(PDF) 223 Page - ATMEL Corporation

부품명 ATmega32HVB
상세설명  8-bit Microcontroller with 16K/32K Bytes In-System Programmable Flash
PDF  273 Pages
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제조업체  ATMEL [ATMEL Corporation]
홈페이지  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega32HVB 데이터시트(HTML) 223 Page - ATMEL Corporation

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8042A–AVR–07/09
ATmega16HVB/32HVB
30.7.9
Programming the Fuse Low Bits
The algorithm for programming the Fuse Low bits is as follows (refer to ”Programming the Flash”
on page 219 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.
30.7.10
Programming the Fuse High Bits
The algorithm for programming the Fuse High bits is as follows (refer to ”Programming the
Flash” on page 219 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.
Figure 30-7. Programming the FUSES Waveforms
30.7.11
Programming the Lock Bits
The algorithm for programming the Lock bits is as follows (refer to ”Programming the Flash” on
page 219 for details on Command and Data loading):
1.
A: Load Command “0010 0000”.
2.
C: Load Data Low Byte. Bit n = “0” programs the Lock bit. If LB mode 3 is programmed
(LB1 and LB2 is programmed), it is not possible to program the Boot Lock bits by any
External Programming mode.
3.
Give WR a negative pulse and wait for RDY/BSY to go high.
The Lock bits can only be cleared by executing Chip Erase.
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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