AT90PWM81-16MF Atmel, AT90PWM81-16MF Datasheet - Page 32
AT90PWM81-16MF
Manufacturer Part Number
AT90PWM81-16MF
Description
IC MCU AVR 8K FLASH ISP 32QFN
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM81-16MN.pdf
(325 pages)
Specifications of AT90PWM81-16MF
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, PWM, WDT
Number Of I /o
20
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
32-MLF®, QFN
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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AT90PWM81
The Oscillator can operate in three different modes, each optimized for a specific frequency range. The
operating mode is selected by CKSEL3..1 fuses or by CSEL3..1 field as shown in
Table 5-6.
Notes:
The CKSEL0 Fuse together with the SUT1..0 Fuses or CSEL0 together with CSUT1..0 field select the
start-up times as shown in
Table 5-7.
Notes:
CKSEL0
CSEL0
CKSEL3..1
CSEL3..1
0
0
0
0
1
1
1
1
100
101
110
111
1. Flash Fuse bits.
2. CLKSELR register bits.
3. This option should not be used with crystals, only with ceramic resonators.
1. Flash Fuse bits.
2. CLKSELR register bits.
3. These options should only be used when not operating close to the maximum frequency of the device,
4. These options are intended for use with ceramic resonators and will ensure frequency stability at start-
(2)
(1)
(3)
and only if frequency stability at start-up is not important for the application. These options are not suit-
able for crystals.
up. They can also be used with crystals when not operating close to the maximum frequency of the
device, and if frequency stability at start-up is not important for the application.
(2)
(1)
Crystal Oscillator Operating Modes
Start-up Times for the Crystal Oscillator Clock Selection
CSUT1..0
SUT1..0
00
01
10
00
01
10
11
11
Frequency Range (MHz)
(1)
(2)
Table
8.0 - 16.0
5-7.
0.4 - 0.9
0.9 - 3.0
3.0 - 8.0
Start-up Time from
Power-down and
16K (16384) CK
16K (16384) CK
16K (16384) CK
1K (1024) CK
1K (1024)CK
1K (1024)CK
Power-save
258 CK
258 CK
(3)
(3)
(4)
(4)
(4)
Additional Delay
14CK + 4.1 ms
14CK + 4.1 ms
14CK + 4.1 ms
14CK + 65 ms
14CK + 65 ms
14CK + 65 ms
(Vcc = 5.0V)
from Reset
C1 and C2 for Use with Crystals (pF)
Recommended Range for Capacitors
14CK
14CK
12 - 22
12 - 22
12 - 22
Recommended Usage
Ceramic resonator, fast
rising power
Ceramic resonator, slowly
rising power
Ceramic resonator, BOD
enabled
Ceramic resonator, fast
rising power
Ceramic resonator, slowly
rising power
Crystal Oscillator, BOD
enabled
Crystal Oscillator, fast
rising power
Crystal Oscillator, slowly
rising power
–
Table
5-6.
7734P–AVR–08/10
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