ATtiny461 Automotive Atmel Corporation, ATtiny461 Automotive Datasheet - Page 38

• Manufacturer Part Number: ATtiny461 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny461 Automotive

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 16
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 150
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

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