at90pwm81-16se ATMEL Corporation, at90pwm81-16se Datasheet - Page 311
at90pwm81-16se
Manufacturer Part Number
at90pwm81-16se
Description
8-bit Avr Microcontroller With 8k Bytes In- System Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.AT90PWM81-16SE.pdf
(323 pages)
- Current page: 311 of 323
- Download datasheet (6Mb)
7734M–AVR–03/10
2. Crystal oscillator control with Clock Switch
3. BOD disable fuse
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 supply voltage (2.6V).
AT90PWM81
311
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