ATMEGA8515-16PI(2010) View Datasheet(PDF) - Atmel Corporation

Part Name

Description

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ATMEGA8515-16PI
(Rev.:2010)

8-bit Microcontroller with 8K Bytes In-System Programmable Flash

Atmel Corporation 

Figure 22. Reset Logic

DATA BUS

BODEN

BODLEVEL

Pull-up Resistor

Spike

Filter

MCU Control and Status

Register (MCUCSR)

Power-on

Reset Circuit

Brown-out

Reset Circuit

Reset Circuit

Watchdog

Timer

Watchdog

Oscillator

Clock

CK

Generator

Delay Counters

TIMEOUT

CKSEL[3:0]

SUT[1:0]

Table 18. Reset Characteristics

Symbol Parameter

Condition

Min Typ Max Units

VPOT

Power-on Reset Threshold

Voltage (rising)(1)

Power-on Reset Threshold

Voltage (falling)

1.4 2.3

V

1.3 2.3

V

VRST

tRST

RESET Pin Threshold Voltage

Minimum pulse width on

RESET Pin

0.1

0.9

VCC

1.5 µs

VBOT

Brown-out Reset Threshold

Voltage(2)

BODLEVEL = 1 2.5 2.7 3.2

V

BODLEVEL = 0 3.7 4.0 4.5

Minimum low voltage period for BODLEVEL = 1

2

µs

tBOD Brown-out Detection

BODLEVEL = 0

2

µs

VHYST Brown-out Detector hysteresis

130

mV

Notes:

1. The Power-on Reset will not work unless the supply voltage has been below VPOT

(falling).

2. VBOT may be below nominal minimum operating voltage for some devices. For

devices where this is the case, the device is tested down to VCC = VBOT during the

production test. This guarantees that a Brown-out Reset will occur before VCC drops

to a voltage where correct operation of the microcontroller is no longer guaranteed.

The test is performed using BODLEVEL=1 for ATmega8515L and BODLEVEL=0 for

ATmega8515. BODLEVEL=1 is not applicable for ATmega8515.

46 ATmega8515(L)

2512K–AVR–01/10

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