ATMEGA48V_06 ATMEL [ATMEL Corporation], ATMEGA48V_06 Datasheet - Page 34

• Manufacturer Part Number: ATMEGA48V_06
• Description: 8-bit Microcontroller with 8K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

7.7
34
128 kHz Internal Oscillator
ATmega48/88/168
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 7-9 on page
Table 7-9.
Note:
The 128 kHz internal Oscillator is a low power Oscillator providing a clock of 128 kHz. The fre-
quency is nominal at 3V and 25°C. This clock may be select as the system clock by
programming the CKSEL Fuses to “11” as shown in
Table 7-10.
Note:
When this clock source is selected, start-up times are determined by the SUT Fuses as shown in
Table
Table 7-11.
Note:
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
BOD enabled
Fast rising power
Slowly rising power
Power Conditions
7-11.
3. If 8 MHz frequency exceeds the specification of the device (depends on V
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to
2.
1. The frequency is preliminary value. Actual value is TBD.
1. If the RSTDISBL fuse is programmed, this start-up time will be increased to
Fuse can be programmed in order to divide the internal frequency by 8.
14CK + 4.1 ms to ensure programming mode can be entered.
The device is shipped with this option selected.
14CK + 4.1 ms to ensure programming mode can be entered.
Start-up times for the internal calibrated RC Oscillator clock selection
128 kHz Internal Oscillator Operating Modes
Start-up Times for the 128 kHz Internal Oscillator
34.
Nominal Frequency
128 kHz
Start-up Time from Power-
Start-up Time from Power-
down and Power-save
down and Power-save
Reserved
Reserved
6 CK
6 CK
6 CK
6 CK
6 CK
6 CK
Table
7-10.
Additional Delay from
Additional Delay from
Reset (V
14CK + 65 ms
14CK + 4.1 ms
14CK + 64 ms
14CK + 4 ms
14CK
14CK
Reset
CC
CKSEL3..0
(1)
(1)
= 5.0V)
0011
(2)
CC
), the CKDIV8
2545J–AVR–12/06
SUT1..0
SUT1..0
00
01
10
11
00
01
10
11