ATMEGA325-16AJ ATMEL [ATMEL Corporation], ATMEGA325-16AJ Datasheet - Page 258

• Manufacturer Part Number: ATMEGA325-16AJ
• Description: 8-bit Microcontroller with In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

258
ATmega325/3250/645/6450
Table 110. Fuse High Byte
Note:
Table 111. Fuse Low Byte
Note:
Fuse High Byte
OCDEN
JTAGEN
SPIEN
WDTON
EESAVE
BOOTSZ1
BOOTSZ0
BOOTRST
Fuse Low Byte
CKDIV8
CKOUT
SUT1
SUT0
CKSEL3
CKSEL2
CKSEL1
CKSEL0
(1)
1. The SPIEN Fuse is not accessible in serial programming mode.
2. The default value of BOOTSZ1..0 results in maximum Boot Size. See Table 104 on
3. See “Watchdog Timer Control Register – WDTCR” on page 44 for details.
4. Never ship a product with the OCDEN Fuse programmed regardless of the setting of
5. 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 for the default clock
2. The default setting of CKSEL3..0 results in internal RC Oscillator @ 8 MHz. See
3. The CKOUT Fuse allow the system clock to be output on PORTE7. See “Clock Out-
4. See “System Clock Prescaler” on page 31 for details.
(3)
(4)
(4)
(3)
(5)
page 254 for details.
Lock bits and JTAGEN Fuse. A programmed OCDEN Fuse enables some parts of the
clock system to be running in all sleep modes. This may increase the power
consumption.
abled. This to avoid static current at the TDO pin in the JTAG interface.
source. See Table 16 on page 39 for details.
Table 7 on page 28 for details.
put Buffer” on page 30 for details.
Bit No
7
6
5
4
3
2
1
0
Bit No
7
6
5
4
3
2
1
0
Select start-up time
Description
Enable OCD
Enable JTAG
Enable Serial Program and Data
Downloading
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
Select Boot Size (see Table 112
for details)
Select Boot Size (see Table 112
for details)
Select Reset Vector
Description
Divide clock by 8
Clock output
Select start-up time
Select Clock source
Select Clock source
Select Clock source
Select Clock source
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)
Default Value
0 (programmed)
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
0 (programmed)
0 (programmed)
1 (unprogrammed)
0 (programmed)
2570A–AVR–09/04
(2)
(2)
(1)
(2)
(2)
(2)
(1)
(2)