ATTINY261-15MZ Atmel, ATTINY261-15MZ Datasheet - Page 38

• Manufacturer Part Number: ATTINY261-15MZ
• Description: MCU AVR 2K FLASH 15MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY261-15MZ

• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 16
• Eeprom Size: 128 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Program Memory Size: 2KB (2K x 8)
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.8
8.8.1
8.8.2
38
Register Description
ATtiny261/ATtiny461/ATtiny861
MCUCR – MCU Control Register
PRR – Power Reduction Register
For analog input pins, the digital input buffer should be disabled at all times. An analog signal
level close to V
input buffers can be disabled by writing to the Digital Input Disable Registers (DIDR0, DIDR1).
Refer to
able Register 1” on page 163
The MCU Control Register contains control bits for power management.
• Bit 5 – 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 programmer’s
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.
• Bits 4, 3 – SM1:0: Sleep Mode Select Bits 2..0
These bits select between the three available sleep modes as shown in
Table 8-2.
• Bit 2 – Res: Reserved Bit
This bit is a reserved ed bit in the ATtiny261/461/861 and will always read as zero.
• Bits 7, 6, 5, 4- Res: Reserved Bits
These bits are reserved bits in the ATtiny261/461/861 and will always read as zero.
Bit
0x35 (0x55)
Read/Write
Initial Value
Bit
0x36 (0x56)
Read/Write
Initial Value
SM1
0
0
1
1
“DIDR0 – Digital Input Disable Register 0” on page 163
7
–
R
0
Sleep Mode Select
7
–
0
R
CC
/2 on an input pin can cause significant current even in active mode. Digital
6
PUD
R/W
0
6
-
R
0
SM0
0
1
0
1
for details.
R/W
5
-
0
5
SE
0
R
Sleep Mode
Idle
ADC Noise Reduction
Power-down
Standby
4
SM1
R/W
0
4
-
R
0
3
PRTIM1
R/W
0
3
SM0
R/W
0
2
—
R
0
2
PRTIM0
R/W
0
or
“DIDR1 – Digital Input Dis-
1
ISC01
R/W
0
1
PRUSI
R/W
0
Table
0
ISC00
R/W
0
8-2.
0
PRADC
R/W
0
7753F–AVR–01/11
MCUCR
PRR