ata5773 ATMEL Corporation, ata5773 Datasheet - Page 231

• Manufacturer Part Number: ata5773
• Description: Microcontroller With Uhf Ask/fsk Transmitter
• Manufacturer: ATMEL Corporation

20.5
20.5.1
8006G–AVR–01/08
System and Reset Characteristics
Standard Power-On Reset
Table 20-4.
Note:
Two versions of power-on reset have been implemented, as follows.
This implementation of power-on reset existed in early 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:
Note:
Table 20-5.
Note:
• ATtiny24, revision D, and older
• ATtiny44, revision C, and older
• ATtiny84, revision A
Symbol
Symbol
V
V
SR
V
V
t
t
V
RST
t
I
HYST
BOD
POR
RST
POA
BG
BG
BG
ON
1. Values are guidelines, only
Revisions are marked on the package (packages 14P3 and 14S1: bottom, package 20M1: top)
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
Parameter
RESET Pin Threshold
Voltage
Minimum pulse width on
RESET Pin
Brown-out Detector
Hysteresis
Min Pulse Width on
Brown-out Reset
Internal bandgap reference
voltage
Internal bandgap reference
start-up time
Internal bandgap reference
current consumption
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-on slope rate
Reset, Brown-out, and Internal Voltage Characteristics
Characteristics of Standard Power-On Reset.
V
Condition
T
T
T
V
V
V
V
V
CC
A
A
A
(2)
CC
CC
CC
CC
CC
= 25°C
= 25°C
= 25°C
(3)
= 1.8V
= 3V
= 5V
= 5V
= 5V
= 5V
0.2 V
Min
Min
T
0.05
0.01
A
1.0
0.7
= -40 - 85°C
(1)
(1)
CC
ATtiny24/44/84
Typ
Typ
2000
700
400
1.1
1.0
0.9
50
40
15
2
(1)
(1)
0.9V
Max
Max
1.2
1.4
1.3
4.5
POA
70
(1)
CC
(1)
Units
Units
V/ms
mV
µA
ns
µs
µs
V
V
V
V
179