ATMEGA64L-8MI View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

ATMEGA64L-8MI

8-bit AVR® Microcontroller with 64K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 22. Reset Logic

PEN

DQ

LQ

Pull-up Resistor

Power-On Reset

Circuit

BODEN

BODLEVEL

RESET

Pull-up Resistor

SPIKE

FILTER

DATA BUS

MCU Control and Status

Register (MCUCSR)

Brown-Out

Reset Circuit

Reset Circuit

JTAG Reset

Register

Watchdog

Timer

Watchdog

Oscillator

Clock

CK

Generator

CKSEL[3:0]

SUT[1:0]

Delay Counters

TIMEOUT

Table 19. Reset Characteristics

Symbol Parameter

VPOT

Power-on Reset

Threshold Voltage

(rising)

Power-on Reset

Threshold Voltage

(falling)(1)

VRST

RESET Pin Threshold

Voltage

tRST

Minimum pulse width on

RESET Pin

VBOT

Brown-out Reset

Threshold Voltage(2)

tBOD

VHYST

Minimum low voltage

period for Brown-out

Detection

Brown-out Detector

hysteresis

Condition

Min Typ Max Units

1.4

2.3

V

1.3

2.3

V

0.2 VCC

0.85 VCC

V

50

ns

BODLEVEL = 1 2.5 2.7

3.2

V

BODLEVEL = 0 3.7 4.0

4.5

BODLEVEL = 1

2

µs

BODLEVEL = 0

2

µs

120

mV

50 ATmega64(L)

2490G–AVR–03/04

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