ATtiny461A Atmel Corporation, ATtiny461A Datasheet - Page 39
ATtiny461A
Manufacturer Part Number
ATtiny461A
Description
Manufacturer
Atmel Corporation
Specifications of ATtiny461A
Flash (kbytes)
4 Kbytes
Pin Count
20
Max. Operating Frequency
20 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
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 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
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7.5.2
8197C–AVR–05/11
PRR – Power Reduction Register
• Bits 4:3 – SM[1:0]: Sleep Mode Select Bits 1 and 0
These bits select between the four available sleep modes as shown in
Table 7-2.
• Bit 2 – BODSE: BOD Sleep Enable
The BODSE bit enables setting of BODS control bit, as explained on BODS bit description. BOD
disable is controlled by a timed sequence.
The Power Reduction Register provides a method to reduce power consumption by allowing
peripheral clock signals to be disabled.
• Bits 7:4 – Res: Reserved Bits
These bits are reserved and will always read zero.
• Bit 3 – PRTIM1: Power Reduction Timer/Counter1
Writing a logic one to this bit shuts down the Timer/Counter1 module. When the Timer/Counter1
is enabled, operation will continue like before the shutdown.
• Bit 2 – PRTIM0: Power Reduction Timer/Counter0
Writing a logic one to this bit shuts down the Timer/Counter0 module. When the Timer/Counter0
is enabled, operation will continue like before the shutdown.
• Bit 1 – PRUSI: Power Reduction USI
Writing a logic one to this bit shuts down the USI by stopping the clock to the module. When
waking up the USI again, the USI should be re initialized to ensure proper operation.
• Bit 0 – PRADC: Power Reduction ADC
Writing a logic one to this bit shuts down the ADC. The ADC must be disabled before shut down.
Also analog comparator needs this clock.
Bit
0x36 (0x56)
Read/Write
Initial Value
SM1
0
0
1
1
Sleep Mode Select
R
7
–
0
SM0
R
6
–
0
0
1
0
1
R
5
–
0
Sleep Mode
Idle
ADC Noise Reduction
Power-down
Standby
R
4
–
0
PRTIM1
ATtiny261A/461A/861A
R/W
3
0
PRTIM0
R/W
2
0
PRUSI
Table
R/W
1
0
7-2.
PRADC
R/W
0
0
PRR
39
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