AT90LS8535-4MC View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

AT90LS8535-4MC

8-Bit AVR® Microcontroller with 4K/8K Bytes In-System Programmable Flash

Atmel Corporation 

External Reset

Figure 24. MCU Start-up, RESET Tied to VCC.

VCC

VPOT

RESET

VRST

TIME-OUT

tTOUT

AT90S/LS8535

INTERNAL

RESET

Figure 25. MCU Start-up, RESET Controlled Externally

VCC

VPOT

RESET

VRST

TIME-OUT

tTOUT

INTERNAL

RESET

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 (VRST) on its positive edge, the delay timer starts the MCU after the Time-out

period tTOUT has expired.

Figure 26. External Reset during Operation

23

1041H–11/01

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