Datasheet

46
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
Figure 10-2. MCU Start-up, RESET Tied to V
CC
Figure 10-3. . MCU Start-up, RESET Extended Externally
Table 10-1. Power On Reset Specifications
Note: 1. Before rising, the supply has to be between V
PORMIN
and V
PORMAX
to ensure a Reset
Symbol Parameter Min Typ Max Units
V
POT
Power-on Reset Threshold Voltage (rising) 1.4 V
Power-on Reset Threshold Voltage (falling)
()
1.0 1.3 1.6 V
V
PORMAX
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
V
CCRR
VCC Rise Rate to ensure Power-on Reset 0.01 V/ms
V
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
CC
RESET
TIME-OUT
INTERNAL
RESET
t
TOUT
V
POT
V
RST
V
CC