ata5773 ATMEL Corporation, ata5773 Datasheet - Page 232
ata5773
Manufacturer Part Number
ata5773
Description
Microcontroller With Uhf Ask/fsk Transmitter
Manufacturer
ATMEL Corporation
Datasheet
1.ATA5773.pdf
(284 pages)
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20.5.2
20.5.3
180
ATtiny24/44/84
Enhanced Power-On Reset
Brown-Out Detection
This implementation of power-on reset exists in newer versions of ATtiny24/44/84. The table
below describes the characteristics of this power-on reset and it is valid for the following devices,
only:
Table 20-6.
Note:
Table 20-7.
Note:
• ATtiny24, revision E, and newer
• ATtiny44, revision D, and newer
• ATtiny84, revision B, and newer
Symbol
V
V
V
POR
POA
PSR
BODLEVEL [2..0] Fuses
1. Values are guidelines, only
2. Threshold where device is released from reset when voltage is rising
3. The Power-on Reset will not work unless the supply voltage has been below V
1. V
this is the case, the device is tested down to V
antees that a Brown-out Reset will occur before V
operation of the microcontroller is no longer guaranteed.
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-On Slope Rate
BOT
Characteristics of Enhanced Power-On Reset.
V
BOT
0XX
may be below nominal minimum operating voltage for some devices. For devices where
111
110
101
100
vs. BODLEVEL Fuse Coding
Min
1.7
2.5
4.1
(1)
(2)
(3)
CC
= V
CC
Typ
1.8
2.7
4.3
BOT
drops to a voltage where correct
BOD Disabled
Min
(1)
0.01
T
1.1
0.6
Reserved
during the production test. This guar-
A
(1)
= -40 - 85°C
Typ
1.4
1.3
(1)
Max
2.0
2.9
4.5
(1)
Max
1.6
1.6
POT
8006G–AVR–01/08
(1)
(falling)
Units
Units
V/ms
V
V
V
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