ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 86

• Manufacturer Part Number: ATmega168 Automotive
• 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

12. 8-bit Timer/Counter0 with PWM
12.1
86
Overview
ATmega48/88/168 Automotive
Timer/Counter0 is a general purpose 8-bit Timer/Counter module, with two independent Output
Compare Units, and with PWM support. It allows accurate program execution timing (event man-
agement) and wave generation. The main features are:
A simplified block diagram of the 8-bit Timer/Counter is shown in
placement of I/O pins, refer to
ters, including I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit
locations are listed in the
The PRTIM0 bit in
enable Timer/Counter0 module.
Figure 12-1. 8-bit Timer/Counter Block Diagram
• Two Independent Output Compare Units
• Double Buffered Output Compare Registers
• Clear Timer on Compare Match (Auto Reload)
• Glitch Free, Phase Correct Pulse Width Modulator (PWM)
• Variable PWM Period
• Frequency Generator
• Three Independent Interrupt Sources (TOV0, OCF0A, and OCF0B)
“Power Reduction Register - PRR” on page 39
Timer/Counter
TCCRnA
OCRnA
TCNTn
OCRnB
=
=
“8-bit Timer/Counter Register Description” on page
“Pinout ATmega48/88/168” on page
Direction
Count
Clear
Control Logic
TOP
=
TCCRnB
Value
BOTTOM
Fixed
TOP
clk
=
Tn
0
Prescaler
OCnA
(Int.Req.)
OCnB
(Int.Req.)
Generation
Generation
Waveform
Waveform
2. CPU accessible I/O Regis-
Figure
TOVn
(Int.Req.)
OCnB
OCnA
must be written to zero to
Oscillator
T/C
clk
I/O
12-1. For the actual
97.
TOSC1
TOSC2
7530I–AVR–02/10