ATMEGA8-16AI SL383 Atmel, ATMEGA8-16AI SL383 Datasheet - Page 38

• Manufacturer Part Number: ATMEGA8-16AI SL383
• Description: Semiconductors and Actives, Microprocessors, Microcontrollers
• Manufacturer: Atmel

38
ATmega8(L)
Figure 14. Reset Logic
Table 15. Reset Characteristics
Notes:
Symbol
V
V
V
V
t
t
BOD
RST
HYST
POT
RST
BOT
1. The Power-on Reset will not work unless the supply voltage has been below V
2. V
BODLEVEL
this is the case, the device is tested down to V
antees that a Brown-out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 1 for ATmega8L and BODLEVEL = 0 for ATmega8. BODLEVEL = 1 is not appli-
cable for ATmega8.
Parameter
Power-on Reset Threshold
Voltage (rising)
Power-on Reset Threshold
Voltage (falling)
RESET Pin Threshold Voltage
Minimum pulse width on
RESET Pin
Brown-out Reset Threshold
Voltage
Minimum low voltage period for
Brown-out Detection
Brown-out Detector hysteresis
BOT
BODEN
may be below nominal minimum operating voltage for some devices. For devices where
(2)
Pull-up Resistor
FILTER
SPIKE
(1)
CKSEL[3:0]
Reset Circuit
SUT[1:0]
Brown-Out
Watchdog
Oscillator
Generator
Clock
BODLEVEL = 1
BODLEVEL = 0
BODLEVEL = 1
BODLEVEL = 0
Condition
CK
MCU Control and Status
Register (MCUCSR)
DATA BUS
CC
Delay Counters
= V
BOT
Min
0.2
2.4
3.7
CC
during the production test. This guar-
drops to a voltage where correct
Typ
130
1.4
1.3
2.6
4.0
2
2
TIMEOUT
Max
2.3
2.3
0.9
1.5
2.9
4.5
Units
2486W–AVR–02/10
POT
V
mV
µs
µs
µs
V
V
V
CC
(falling).