ATMEGA16A-AUR Atmel, ATMEGA16A-AUR Datasheet - Page 36

• Manufacturer Part Number: ATMEGA16A-AUR
• Description: MCU AVR 16KB FLASH 16MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA16A-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

9.10
9.10.1
36
Register Description
ATmega16A
MCUCR – MCU Control Register
The MCU Control Register contains control bits for power management.
• Bits 7, 5, 4 – SM2:0: Sleep Mode Select Bits 2, 1, and 0
These bits select between the six available sleep modes as shown in
Table 9-2.
Note:
• Bit 6 – SE: Sleep Enable
The SE bit must be written to logic one to make the MCU enter the sleep mode when the SLEEP
instruction is executed. To avoid the MCU entering the sleep mode unless it is the programmers
purpose, it is recommended to write the Sleep Enable (SE) bit to one just before the execution of
the SLEEP instruction and to clear it immediately after waking up.
Bit
Read/Write
Initial Value
SM2
0
0
0
0
1
1
1
1
1. Standby mode and Extended Standby mode are only available with external crystals or
resonators.
Sleep Mode Select
SM2
R/W
7
0
SM1
0
0
1
1
0
0
1
1
R/W
SE
6
0
SM0
SM1
R/W
0
1
0
1
0
1
0
1
5
0
SM0
R/W
Sleep Mode
Idle
ADC Noise Reduction
Power-down
Power-save
Reserved
Reserved
Standby
Extended Standby
4
0
(1)
ISC11
R/W
3
0
(1)
ISC10
R/W
2
0
Table
ISC01
R/W
1
0
9-2.
ISC00
R/W
0
0
8154B–AVR–07/09
MCUCR