Datasheet

251
ATtiny828 [DATASHEET]
8371A–AVR–08/12
24.5.1 Power-On Reset
Table 108. Characteristics of Enhanced Power-On Reset. T
A
= -40 to +85°C
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
POT
(falling)
24.5.2 Brown-Out Detection
Table 109. V
BOT
vs. BODLEVEL Fuse Coding
Note: 1. V
BOT
may be below nominal minimum operating voltage for some devices. For devices where this is the
case, the device is tested down to V
CC
= V
BOT
during the production test. This guarantees that a Brown-out
Reset will occur before V
CC
drops to a voltage where correct operation of the microcontroller is no longer
guaranteed.
24.6 Temperature Sensor
Table 110. Accuracy of Temperature Sensor at Factory Calibration
Note: 1. Firmware calculates temperature based on factory calibration value.
2. Min and max values are not guaranteed. Contact your local Atmel sales office if higher accuracy is required.
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
BODLEVEL[2:0] Fuses Min
(1)
Typ
(1)
Max
(1)
Units
11X 1.7 1.8 2.0
V101 2.5 2.7 2.9
100 4.1 4.3 4.5
0XX Reserved
Symbol Parameter Condition Min Typ Max Units
A
TS
Accuracy V
CC
= 4.0, T
A
= 25°C – 85°C 10 °C