atmega323l ATMEL Corporation, atmega323l Datasheet - Page 27

• Manufacturer Part Number: atmega323l
• Description: Atmega323 8-bit Avr Microcontroller With 32k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

1457G–AVR–09/03
Table 6. Reset Delay Selections
Notes:
CKSEL
0010
0000
0001
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
(6)
1. On Power-up, the start-up time is increased with Typ 0.6 ms.
2. “1” means unprogrammed, “0” means programmed.
3. For possible clock selections, see “Clock Options” on page 6.
4. When BODEN is programmed, add 100 µs.
5. When BODEN is programmed, add 25 µs.
6. Default value.
(2)
Start-up Time, V
2.7V, BODLEVEL
30 µs + 16K CK
4.2 ms + 16K CK
Unprogrammed
67 ms + 32K CK
67 ms + 16K CK
30 µs + 1K CK
4.2 ms + 1K CK
30 µs + 6 CK
30 µs + 6 CK
30 µs + 6 CK
67 ms + 1K CK
4.2 ms + 6 CK
4.2 ms + 6 CK
4.2 ms + 6 CK
67 ms + 6 CK
67 ms + 6 CK
67 ms 1K CK
(4)
(4)
(4)
(4)
CC
(4)
(1)
=
Start-up Time, V
4.0V, BODLEVEL
10 µs + 16K CK
5.8 ms + 16K CK
92 ms + 32K CK
92 ms + 16K CK
10 µs + 1K CK
5.8 ms + 1K CK
10 µs + 6 CK
10 µs + 6 CK
10 µs + 6 CK
92 ms + 1K CK
92 ms + 1K CK
5.8 ms + 6 CK
5.8 ms + 6 CK
5.8 ms + 6 CK
Programmed
92 ms + 6 CK
92 ms + 6 CK
(5)
(5)
(5)
(5)
CC
(5)
=
ATmega323(L)
Recommended Usage
Ext. Clock, Fast Rising
Power
Ext. Clock, BOD Enabled
Int. RC Oscillator, Slowly
Rising Power
Int. RC Oscillator, Fast
Rising Power
Int. RC Oscillator, BOD
Enabled
Ext. RC Oscillator, Slowly
Rising Power
Ext. RC Oscillator, Fast
Rising Power
Ext. RC Oscillator, BOD
Enabled
Ext. Low-frequency
Crystal
Ext. Low-frequency
Crystal
Crystal Oscillator, Slowly
Rising Power
Crystal Oscillator, Fast
Rising Power
Crystal Oscillator, BOD
Enabled
Ceramic Resonator/Ext.
Clock, Slowly Rising
Power
Ceramic Resonator, Fast
Rising Power
Ceramic Resonator, BOD
Enabled
(3)
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