ATTINY2313-20PU datasheet(39/231 Pages) ATMEL

Part #	ATTINY2313-20PU

Description	8-bit Microcontroller with 2K Bytes In-System Programmable Flash

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Manufacturer	ATMEL [ATMEL Corporation]

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39

ATtiny2313/V

2543I–AVR–04/06

Note:

1. 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 V

CC drops

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

The

test

is

performed

using

BODLEVEL = 110

for

ATtiny2313V

and

BODLEVEL = 101 for ATtiny2313L.

When the BOD is enabled, and V

CC decreases to a value below the trigger level (VBOT-

in Figure 18), the Brown-out Reset is immediately activated. When V

CC increases above

the trigger level (V

BOT+ in Figure 18), the delay counter starts the MCU after the Time-

out period t

TOUT has expired.

The BOD circuit will only detect a drop in V

CC if the voltage stays below the trigger level

for longer than t

BOD given in Table 15.

Figure 18. Brown-out Reset During Operation

011

Reserved

010

001

000

Table 17. Brown-out Characteristics

Symbol

Parameter

Min

Typ

Max

Units

V

HYST

Brown-out Detector Hysteresis

50

mV

tBOD

Min Pulse Width on Brown-out Reset

2

ns

Table 16. BODLEVEL Fuse Coding

(1)

BODLEVEL 2..0 Fuses

Min VBOT

Typ VBOT

Max VBOT

Units

VCC

RESET

TIME-OUT

INTERNAL

RESET

VBOT-

VBOT+

tTOUT

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