ATMEga64L ATMEL Corporation, ATMEga64L Datasheet - Page 292

• Manufacturer Part Number: ATMEga64L
• Description: 8-bit AVR Microcontroller with 64K Bytes In-System Programmable Flash
• Manufacturer: ATMEL Corporation

292
ATmega64(L)
Table 119. Fuse High Byte
Notes:
Table 120. Fuse Low Byte
Notes:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are
locked if Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the
Lock bits.
OCDEN
JTAGEN
SPIEN
CKOPT
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
BODLEVEL
BODEN
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
Fuse High Byte
Fuse Low Byte
(1)
1. The SPIEN Fuse is not accessible in SPI Serial Programming mode.
2. The CKOPT Fuse functionality depends on the setting of the CKSEL bits. See
3. The default value of BOOTSZ1..0 results in maximum Boot Size. See Table 113 on
4. If the JTAG interface is left unconnected, the JTAGEN fuse should if possible be dis-
1. The default value of SUT1..0 results in maximum start-up time. See Table 14 on page
2. The default setting of CKSEL3..0 results in internal RC Oscillator @ 1 MHz. See
(2)
(4)
Sources” on page 36
page 289
abled. This to avoid static current at the TDO pin in the JTAG interface
40 for details.
Table 6 on page 36 for details.
Bit no
Bit no
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
Brown out detector trigger
level
Brown out detector enable
Select start-up time
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
Description
Enable OCD
Enable JTAG
Enable SPI Serial Program and
Data Downloading
Oscillator options
EEPROM memory is preserved
through the Chip Erase
Select Boot Size (see Table 113
for details)
Select Boot Size (see Table 113
for details)
Select Reset Vector
for details.
Default Value
1 (unprogrammed)
1 (unprogrammed, BOD
disabled)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
Default Value
1 (unprogrammed, OCD
disabled)
0 (programmed, JTAG
enabled)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed,
EEPROM not preserved)
0 (programmed)
0 (programmed)
1 (unprogrammed)
(1)
(2)
(2)
(2)
(1)
(2)
2490G–AVR–03/04
(3)
(3)
“Clock