ATMEGA16A-PU Atmel, ATMEGA16A-PU Datasheet - Page 32
Manufacturer Part Number
MCU AVR 16K FLASH 16MHZ 40-PDIP
Specifications of ATMEGA16A-PU
I²C, SPI, UART/USART
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
Program Memory Size
16KB (8K x 16)
Program Memory Type
512 x 8
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Data Bus Width
Data Ram Size
Maximum Clock Frequency
Number Of Programmable I/os
Number Of Timers
Maximum Operating Temperature
+ 85 C
3rd Party Development Tools
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
8-ch x 10-bit
Operating Supply Voltage
No. Of I/o's
Eeprom Memory Size
Ram Memory Size
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
9. Power Management and Sleep Modes
Sleep modes enable the application to shut down unused modules in the MCU, thereby saving
power. The AVR provides various sleep modes allowing the user to tailor the power consump-
tion to the application’s requirements.
Figure 8-1 on page 24
bution. The figure is helpful in selecting an appropriate sleep mode.
different sleep modes and their wake-up sources.
To enter any of the six sleep modes, the SE bit in MCUCR must be written to logic one and a
SLEEP instruction must be executed. The SM2, SM1, and SM0 bits in the MCUCR Register
select which sleep mode (Idle, ADC Noise Reduction, Power-down, Power-save, Standby, or
Extended Standby) will be activated by the SLEEP instruction. See
If an enabled interrupt occurs while the MCU is in a sleep mode, the MCU wakes up. The MCU
is then halted for four cycles in addition to the start-up time, it executes the interrupt routine, and
resumes execution from the instruction following SLEEP. The contents of the Register File and
SRAM are unaltered when the device wakes up from sleep. If a Reset occurs during sleep
mode, the MCU wakes up and executes from the Reset Vector.
1. External Crystal or resonator selected as clock source.
2. If AS
3. Only INT2 or level interrupt INT1 and INT0.
Active Clock Domains and Wake Up Sources in the Different Sleep Modes
bit in ASSR is set.
Active Clock domains
presents the different clock systems in the ATmega16A, and their distri-
for a summary.