atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 46

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

7.2.2
46
ATmega32/64/M1/C1
External Reset
Figure 7-2.
Figure 7-3.
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the
Reset Threshold Voltage – V
the Time-out period – t
Figure 7-4.
INTE R NAL
INTERNAL
V
TIME-OUT
TIME -OUT
CC
R E S E T
RESET
RESET
R E S E T
V
MCU Start-up, RESET Tied to V
MCU Start-up, RESET Extended Externally
External Reset During Operation
CC
CC
V
CCRR
TOUT
V
– has expired.
Table
V
V
R S T
PORMAX
PORMIN
RST
V
POT
– on its positive edge, the delay counter starts the MCU after
7-1) will generate a reset, even if the clock is not running.
t
TOUT
CC
V
RST
t
TOUT
7647A–AVR–02/08