ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 39

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ATmega168 Automotive

Manufacturer Part Number
ATmega168 Automotive
Description
Manufacturer
Atmel Corporation

Specifications of ATmega168 Automotive

Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
Eeprom (bytes)
512
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
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
8.9.2
7701E–AVR–02/11
PRR – Power Reduction Register
• Bits 7, 6, 5, 4- Res: Reserved Bits
These bits are reserved bits in the ATtiny24/44/84 and will always read as zero.
• Bit 3- PRTIM1: Power Reduction Timer/Counter1
Writing a logical one to this bit shuts down the timer/counter 1 module. When the timer/counter
1 is enabled, operation will continue like before the shutdown.
• Bit 2- PRTIM0: Power Reduction Timer/Counter0
Writing a logical one to this bit shut s down the timer/counter 0 module. When the timer/coun-
ter 0 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. The analog comparator cannot use the ADC input MUX when the ADC is shut down.
Bit
Read/Write
Initial Value
R
7
0
R
6
0
Atmel ATtiny24/44/84 [Preliminary]
R
5
0
R
4
0
PRTIM1
R/W
3
0
PRTIM0
R/W
2
0
PRUSI
R/W
1
0
PRADC
R/W
0
0
PRR
39

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