Rainbow-electronics ATtiny861_V Manual do Utilizador descarregar pdf (Página 189)

189

2588B–AVR–11/06

ATtiny261/461/861

23.5 System and Reset Characteristics

Notes: 1. Values are guidelines only. Actual values are TBD.

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

POT

(falling)

Note: 1. V

BOT

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

this is the case, the device is tested down to V

= V

BOT

during the production test. This guar-

antees that a Brown-out Reset will occur before V

drops to a voltage where correct

operation of the microcontroller is no longer guaranteed.

Table 23-3. Reset, Brown-out and Internal Voltage Characteristics

(1)

Symbol Parameter Condition Min Typ Max Units

POT

Power-on Reset Threshold

Voltage (rising)

= -40 - 85°C 0.7 1.0 1.4 V

Power-on Reset Threshold

Voltage (falling)

(2)

= -40 - 85°C 0.6 0.9 1.3 V

RST

RESET Pin Threshold

Voltage

= 3V 0.2 V

0.9 V

RST

Minimum pulse width on

RESET Pin

= 3V 2.5 µs

HYST

Brown-out Detector

Hysteresis

50 mV

BOD

Min Pulse Width on Brown-

out Reset

2µs

Bandgap reference voltage

= 2.7V,

=25°C

1.0 1.1 1.2 V

Bandgap reference start-up

time

= 2.7V,

=25°C

40 70 µs

Bandgap reference current

consumption

= 2.7V,

=25°C

15 µA

Table 23-4. BODLEVEL Fuse Coding

(1)

BODLEVEL [2..0] Fuses Min V

BOT

Typ V

BOT

Max V

BOT

Units

111 BOD Disabled

110 1.7 1.8 2.0

V101 2.5 2.7 2.9

100 4.1 4.3 4.5

011

Reserved

010

001

000

1 2 ... 184 185 186 187 188 189 190 191 192 193 194 ... 235 236

Comentários a estes Manuais

Sem comentários

Rainbow-electronics ATtiny861_V Manual do Utilizador Página 189

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Rainbow-electronics ATtiny861_V