attiny261a-xu ATMEL Corporation, attiny261a-xu Datasheet - Page 187

• Manufacturer Part Number: attiny261a-xu
• Description: 8-bit Avr Microcontroller With 2/4/8k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

19.5
19.5.1
19.5.2
8197B–AVR–01/10
System and Reset Characteristics
Enhanced Power-On Reset
Brown-Out Detection
Table 19-4.
Notes:
Table 19-5.
Note:
Table 19-6.
Note:
Symbol
Symbol
V
V
SR
V
V
t
t
V
RST
t
I
HYST
BOD
POR
RST
POA
BG
BG
BG
ON
BODLEVEL [2:0] Fuses
1. Not tested. Values are guidelines, only.
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
RESET Pin Threshold Voltage
Min pulse width on RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on
Brown-out Reset
Internal bandgap voltage
Internal bandgap 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
BOT
Reset, Brown-out, and Internal Voltage Characteristics
Characteristics of Enhanced Power-On Reset.
BODLEVEL Fuse Coding
0XX
may be below nominal minimum operating voltage for some devices. For devices where
110
101
100
111
(1)
(1)
Min V
(1)
(1)
(1)
(1)
(1)
1.7
2.5
4.1
BOT
(2)
V
Condition
T
T
T
V
V
V
(3)
CC
A
A
A
CC
CC
CC
= 25°C
= 25°C
= 25°C
= 2.7V
= 3V
= 5V
= 5V
CC
= V
Typ V
CC
1.8
2.7
4.3
BOT
drops to a voltage where correct
0.2 V
BOD Disabled
Min
0.01
Min
BOT
1.0
T
1.1
0.6
Reserved
during the production test. This guar-
A
(1)
= -40 – 85°C
CC
Typ
Typ
1.1
1.4
1.3
50
40
15
Max V
2
(1)
2.0
2.9
4.5
BOT
0.9 V
Max
Max
2.5
1.2
1.6
1.6
70
POA
(1)
CC
.
Units
Units
Units
V/ms
V
mV
µA
µs
µs
µs
V
V
V
V
187