ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 89

• Manufacturer Part Number: ATtiny43U
• Manufacturer: Atmel Corporation

Specifications of ATtiny43U

• Flash (kbytes): 4 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 8 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: 4
• 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): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 0.7 to 5.5
• Operating Voltage (vcc): 0.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

8048B–AVR–03/09
Figure 12-8. Timer/Counter Timing Diagram, no Prescaling
Figure 12-9 on page 89
Figure 12-9. Timer/Counter Timing Diagram, with Prescaler (f
Figure 12-10 on page 89
except CTC mode and PWM mode, where OCRnA is TOP.
Figure 12-10. Timer/Counter Timing Diagram, Setting of OCFnx, with Prescaler (f
Figure 12-11 on page 90
and fast PWM mode where OCRnA is TOP.
TCNTn
TCNTn
(clk
TCNTn
(clk
OCRnx
(clk
OCFnx
TOVn
TOVn
clk
clk
clk
clk
clk
clk
I/O
I/O
I/O
I/O
I/O
Tn
I/O
Tn
Tn
/8)
/8)
/1)
OCRnx - 1
MAX - 1
MAX - 1
shows the same timing data, but with the prescaler enabled.
shows the setting of OCFnA and the clearing of TCNTn in CTC mode
shows the setting of OCFnB in all modes and OCFnA in all modes
OCRnx
MAX
MAX
OCRnx Value
OCRnx + 1
BOTTOM
BOTTOM
clk_I/O
/8)
BOTTOM + 1
BOTTOM + 1
clk_I/O
OCRnx + 2
/8)
89