at90ls4433 ATMEL Corporation, at90ls4433 Datasheet - Page 24
at90ls4433
Manufacturer Part Number
at90ls4433
Description
At90s4433 8-bit Avr Microcontroller With 4k Bytes Of In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT90LS4433.pdf
(126 pages)
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External Reset
24
AT90S/LS4433
Figure 25. MCU Start-up, RESET Tied to V
Figure 26. MCU Start-up, RESET Controlled Externally
An External Reset is generated by a low level on the RESET pin. Reset pulses longer
than 50 ns will generate a Reset, even if the clock is not running. Shorter pulses are not
guaranteed to generate a Reset. When the applied signal reaches the Reset Threshold
Voltage (V
period (t
Figure 27. External Reset during Operation
INTERNAL
INTERNAL
TIME-OUT
TIME-OUT
RESET
RESET
RESET
RESET
TOUT
VCC
VCC
RST
) has expired.
) on its positive edge, the delay timer starts the MCU after the Time-out
V
V
V
POT
POT
RST
t
TOUT
V
RST
CC
t
TOUT
1042H–AVR–04/03
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