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ATmega48 Datasheet(PDF) 43 Page - ATMEL Corporation

No. de pieza ATmega48
Descripción Electrónicos  8-bit Microcontroller with 8K Bytes In-System Programmable Flash
PDF  340 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega48 Datasheet(HTML) 43 Page - ATMEL Corporation

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43
7530H–AVR–02/09
ATmega48/88/168 Automotive
Figure 8-2.
MCU Start-up, RESET Tied to V
CC
Figure 8-3.
MCU Start-up, RESET Extended Externally
Note:
1. Before rising, the supply has to be between
V
PORMIN and VPORMAX to ensure a Reset.
Table 8-1.
Power On Reset Specifications
Symbol
Parameter
Min
Typ
Max
Units
V
POT
Power-on Reset Threshold Voltage (rising)
1.1
1.4
1.7
V
Power-on Reset Threshold Voltage (falling)(1)
0.8
1.3
1.6
V
VPORMAX
VCC Max. start voltage to ensure internal
Power-on Reset signal
0.4
V
V
PORMIN
VCC Min. start voltage to ensure internal
Power-on Reset signal
-0.1
V
VCCRR
VCC Rise Rate to ensure Power-on Reset
0.01
V/ms
VRST
RESET Pin Threshold Voltage
0.1 VCC
0.9VCC
V
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
RST
V
PORMA
X
VCC
CCRR
V
V
PORMIN
RESET
TIME-OUT
INTERNAL
RESET
tTOUT
VRST
VCC



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