AT90PWM81-16SN Atmel, AT90PWM81-16SN Datasheet - Page 311
AT90PWM81-16SN
Manufacturer Part Number
AT90PWM81-16SN
Description
IC MCU AVR 8K FLASH ISP 20SOIC
Manufacturer
Atmel
Series
AVR® 90PWM Lightingr
Datasheet
1.AT90PWM81-16MN.pdf
(325 pages)
Specifications of AT90PWM81-16SN
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, PWM, WDT
Number Of I /o
16
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 8x10b; D/A 1x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 105°C
Package / Case
20-SOIC (7.5mm Width)
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SPI
Maximum Clock Frequency
16 MHz
Number Of Timers
1
Maximum Operating Temperature
+ 105 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
On-chip Dac
10 bit, 1 Channel
Height
2.35 mm
Length
13 mm
Supply Voltage (max)
5.5 V
Supply Voltage (min)
2.7 V
Width
7.6 mm
For Use With
ATSTK600-SOIC - STK600 SOCKET/ADAPTER FOR SOIC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AT90PWM81-16SN
Manufacturer:
Atmel
Quantity:
1 500
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7734P–AVR–08/10
1. Clock Switch enable & disable
2. Crystal oscillator control with Clock Switch
3. BOD disable fuse
4. PSC output at Reset
5. Flash and EEPROM programming failure if CPU clock is switched
6. ADC AMPlifier measurement is unstable
After a “Enable Clock Source” or a “Disable Clock Source” command, the command is still
active until the next access of CLKCSR register. If CLKSEL is written with a new value, the
corresponding clock will be unintentionnaly enabled or disabled.
Work around:
Atter the Enable or Disable command, write CLKCSR with value 1<<CLKCCE
When a Xtal oscillator is active and CLKSELR is written with a new value for the selection of
another clock source (for instance RC or WD) , the Xtal oscillator gain is not correct.
Work around:
After the commands “Enable Clock Source” and “Clock Source Switching”, write back CLK-
SELR with the values corresponding to the active Xtal oscillator
It is strongly advised to keep the BOD active. Indeed, the RC oscillator may lock if it is acti-
vated when the power suppy goes at a low voltage.
Work around:
If it is mandatory to disable the BOD, do not set the RC oscillator as clock source during
reset and makes sure the RC oscillator is never active when the power supply is below the
lowest POR voltage (2.6V).
At Reset, the PSC outputs may be set at a value different from the PSC Fuse configuration
(Bit 4 of Extended Fuse Byte).
Work around:
Initiate PSC output states from source code.
If Clock switching is used in the Application, the memory programming is only possible when
the internal RC oscillator is selected as System clock.
If the Application requires a memory programming on a clock source different from the inter-
nal RC oscillator, do not switch to this clock source.
Work around:
- Use internal RC oscillator when programming Flash and EEPROM,
or
- Do not use clock switching
When switching from a single-ended ADC channel to an Amplified channel, noise can
appear on ADC conversion.
Work around:
After switching from a single ended to an amplified channel, discard the first ADC
conversion.
AT90PWM81
311
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