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ATTINY2313 Datasheet(PDF) 36 Page - ATMEL Corporation

Part No. ATTINY2313
Description  8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash
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Maker  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
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 36 page
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36
ATtiny2313/V
2543C–AVR–12/03
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 VCC 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 V
BOT
Typ V
BOT
Max V
BOT
Units
VCC
RESET
TIME-OUT
INTERNAL
RESET
VBOT-
VBOT+
tTOUT




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