Datasheet

118
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
16.5 System and Reset Characteristics
Note: 1. Values are guidelines, only
16.5.1 Power-On Reset
Note: 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
POA
16.5.2 V
CC
Level Monitor
Note: 1. Typical values at room temperature
Table 16-4. Reset, VLM, and Internal Voltage Characteristics
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
V
RST
RESET Pin Threshold
Voltage
0.2 V
CC
0.9V
CC
V
t
RST
Minimum pulse width on
RESET
Pin
V
CC
= 1.8V
V
CC
= 3V
V
CC
= 5V
2000
700
400
ns
t
TOUT
Time-out after reset 32 64 128 ms
Table 16-5. Characteristics of Enhanced Power-On Reset. T
A
= -40 - 85C
Symbol Parameter Min
(1)
Typ
(1)
Max
(1)
Units
V
POR
Release threshold of power-on reset
(2)
1.1 1.4 1.6 V
V
POA
Activation threshold of power-on reset
(3)
0.6 1.3 1.6 V
SR
ON
Power-On Slope Rate 0.01 V/ms
Table 16-6. Voltage Level Monitor Thresholds
Parameter Min Typ
(1)
Max Units
Trigger level VLM1L 1.1 1.4 1.6
V
Trigger level VLM1H 1.4 1.6 1.8
Trigger level VLM2 2.0 2.5 2.7
Trigger level VLM3 3.2 3.7 4.5
Settling time VMLM2,VLM3 (VLM1H,VLM1L) 5 (50) µs