ATtiny167 Automotive Atmel Corporation, ATtiny167 Automotive Datasheet - Page 130

• Manufacturer Part Number: ATtiny167 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATtiny167 Automotive

• Flash (kbytes): 16 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: 2
• Twi (i2c): 1
• Uart: 1
• Lin: 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): 0.5
• 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: 2
• Output Compare Channels: 3
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

12.10 Timer/Counter Timing Diagrams
130
ATtiny87/ATtiny167
In phase and frequency correct PWM mode, the compare units allow generation of PWM
waveforms on the OC1A/B pins. Setting the COM1A/B1:0 bits to two will produce a
non-inverted PWM and an inverted PWM output can be generated by setting the COM1A/B1:0
to three (See
if the data direction for the port pin is set as output (DDR_OC1A/B) and OC1A/Bi is set. The
PWM waveform is generated by setting (or clearing) the OC1A/B Register at the compare
match between OCR1A/B and TCNT1 when the counter increments, and clearing (or setting)
the OC1A/B Register at compare match between OCR1A/B and TCNT1 when the counter
decrements. The PWM frequency for the output when using phase and frequency correct
PWM can be calculated by the following equation:
The N variable represents the prescaler divider (1, 8, 64, 256, or 1024).
The extreme values for the OCR1A/B Register represents special cases when generating a
PWM waveform output in the phase correct PWM mode. If the OCR1A/B is set equal to BOT-
TOM the output will be continuously low and if set equal to TOP the output will be set to high
for non-inverted PWM mode. For inverted PWM the output will have the opposite logic values.
The Timer/Counter is a synchronous design and the timer clock (clk
clock enable signal in the following figures. The figures include information on when interrupt
flags are set, and when the OCR1A/B Register is updated with the OCR1A/B buffer value
(only for modes utilizing double buffering).
of OCF1A/B.
Figure 12-11. Timer/Counter Timing Diagram, Setting of OCF1A/B, no Prescaling
Figure 12-12
TCNTn
OCRnx
OCFnx
(clk
clk
clk
I/O
shows the same timing data, but with the prescaler enabled.
Table on page
I/O
Tn
/1)
OCRnx - 1
133). The actual OC1A/B value will only be visible on the port pin
f
OCnxPFCPWM
OCRnx
Figure 12-11
OCRnx Value
=
---------------------------------
2
f
clk_I/O
N
OCRnx + 1
TOP
shows a timing diagram for the setting
T
1) is therefore shown as a
OCRnx + 2
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