AT90PWM1-16MU Atmel, AT90PWM1-16MU Datasheet - Page 45
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AT90PWM1-16MU
Manufacturer Part Number
AT90PWM1-16MU
Description
IC AVR PWM 8KB FLASH 16MHZ 32QFN
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM1-16SU.pdf
(297 pages)
Specifications of AT90PWM1-16MU
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
19
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-QFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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9.0.5
4378C–AVR–09/08
Brown-out Detection
AT90PWM1 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
ing operation by comparing it to a fixed trigger level. The trigger level for the BOD can be
selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
Table 9-2.
Notes:
Table 9-3.
Notes:
When the BOD is enabled, and V
9-5), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
longer than t
Symbol
V
t
BOT
BOD
BOT+
HYST
+ V
BODLEVEL 2..0 Fuses
in
1. V
2. Values are guidelines only.
1. Values are guidelines only.
HYST
Figure
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. The test is performed using
BODLEVEL = 010 for Low Operating Voltage and BODLEVEL = 101 for High Operating Volt-
age .
BOD
BOT
/2 and V
BODLEVEL Fuse Coding
Brown-out Characteristics
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
101
100
010
001
000
may be below nominal minimum operating voltage for some devices. For devices where
110
011
111
given in
9-5), the delay counter starts the MCU after the Time-out period t
BOT-
Table
= V
BOT
9-3.
- V
CC
HYST
decreases to a value below the trigger level (V
Min V
(1)(2)
/2.
(1)
BOT
CC
if the voltage stays below the trigger level for
CC
4.2
2.8
2.6
Typ V
= V
Min.
4.5
2.7
4.3
4.4
BOT
BOD Disabled
CC
CC
BOT
during the production test. This guar-
increases above the trigger level
drops to a voltage where correct
Typ.
70
2
Max V
AT90PWM1
Max.
BOT
BOT-
CC
level dur-
TOUT
in
Units
Units
mV
BOT+
Figure
V
V
V
V
V
V
V
µs
has
45
=
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