參數(shù)資料
型號: MQ80C52EXXX-36/883D
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 36 MHz, MICROCONTROLLER, CQFP44
封裝: CERAMIC, QFP-44
文件頁數(shù): 107/141頁
文件大?。?/td> 7628K
代理商: MQ80C52EXXX-36/883D
38
2486AA–AVR–02/2013
ATmega8(L)
Figure 14. Reset Logic
Notes:
1. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling)
2. VBOT may be below nominal minimum operating voltage for some devices. For devices where
this is the case, the device is tested down to V
CC = VBOT during the production test. This guar-
antees that a Brown-out Reset will occur before V
CC drops to a voltage where correct
operation of the microcontroller is no longer guaranteed. The test is performed using BOD-
LEVEL = 1 for ATmega8L and BODLEVEL = 0 for ATmega8. BODLEVEL = 1 is not applicable
for ATmega8
Table 15. Reset Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Units
VPOT
Power-on Reset Threshold
Voltage (rising)(1)
1.4
2.3
V
Power-on Reset Threshold
Voltage (falling)
1.3
2.3
VRST
RESET Pin Threshold Voltage
0.2
0.9
tRST
Minimum pulse width on
RESET Pin
1.5
s
VBOT
Brown-out Reset Threshold
Voltage(2)
BODLEVEL = 1
2.4
2.6
2.9
V
BODLEVEL = 0
3.7
4.0
4.5
tBOD
Minimum low voltage period for
Brown-out Detection
BODLEVEL = 1
2
s
BODLEVEL = 0
2
V
HYST
Brown-out Detector hysteresis
130
mV
MCU Control and Status
Register (MCUCSR)
Brown-Out
Reset Circuit
BODEN
BODLEVEL
Delay Counters
CKSEL[3:0]
CK
TIMEOUT
WDRF
BORF
EXTRF
PORF
DATA BUS
Clock
Generator
SPIKE
FILTER
Pull-up Resistor
Watchdog
Oscillator
SUT[1:0]
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