attiny24v ATMEL Corporation, attiny24v Datasheet - Page 178

• Manufacturer Part Number: attiny24v
• Description: 8-bit Avr Microcontroller With 2/4/8k Bytes Insystem Programmable Flash
• Manufacturer: ATMEL Corporation

20.5.1
20.5.2
178
ATtiny24/44/84
Standard Power-On Reset
Enhanced Power-On Reset
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:
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:
• ATtiny24, revision D, and older
• ATtiny44, revision C, and older
• ATtiny84, revision A
• ATtiny24, revision E, and newer
• ATtiny44, revision D, and newer
• ATtiny84, revision B, and newer
Symbol
Symbol
V
SR
V
SR
V
V
POR
POR
POA
POA
ON
ON
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
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
Release threshold of power-on reset
Activation threshold of power-on reset
Power-on slope rate
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-On Slope Rate
Characteristics of Standard Power-On Reset.
Characteristics of Enhanced Power-On Reset.
(2)
(2)
(3)
(3)
Min
Min
T
0.05
0.01
0.01
T
A
0.7
1.1
0.6
A
= -40 - 85°C
(1)
(1)
= -40 - 85°C
Typ
Typ
1.0
0.9
1.4
1.3
(1)
(1)
Max
Max
1.4
1.3
4.5
POA
1.6
1.6
POA
8006H–AVR–10/09
(1)
(1)
Units
Units
V/ms
V/ms
V
V
V
V