atmega161-4pi ATMEL Corporation, atmega161-4pi Datasheet - Page 83

• Manufacturer Part Number: atmega161-4pi
• Description: 8-bit Microcontroller With 16k Bytes Of In-system Programmable Flash
• Manufacturer: ATMEL Corporation

Internal Voltage
Reference
Voltage Reference
Enable Signals and Start-
up Time
1228D–AVR–02/07
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.
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
mode, the user can turn off the reference when entering this mode.
µ
A, and to reduce the power consumption in Power-down
ATmega161(L)
83