Rainbow-electronics ATmega161L Manuel d'utilisateur télécharger pdf (Page 83)

ATmega161(L)

1228C–AVR–08/02

Internal Voltage

Reference

ATmega161 features an internal voltage reference with a nominal voltage of 1.22V. This

reference can be used as an input to the Analog Comparator.

Voltage Reference

Enable Signals and Start-

up Time

The voltage reference has a start-up time that may have an influence on the way it

should be used. The maximum start-up time is TBD. To save power, the reference is on

only when the AINBG bit in ACSR is set. Thus the user must always allow the reference

to start up before the output from the Analog Comparator is used. The bandgap refer-

ence uses approximately 10

µA, and to reduce the power consumption in Power-down

mode, the user can turn off the reference when entering this mode.

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Rainbow-electronics ATmega161L Manuel d'utilisateur Page 83