ATtiny43U Atmel Corporation, ATtiny43U Datasheet - Page 95

• 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

12.9.6
12.9.7
12.9.8
12.9.9
12.9.10
12.9.11
8048B–AVR–03/09
TCNT1 – Timer/Counter Register
OCR0A – Output Compare Register A
OCR1A – Output Compare Register A
OCR0B – Output Compare Register B
OCR1B – Output Compare Register B
TIMSK0 – Timer/Counter 0 Interrupt Mask Register
The Timer/Counter Register gives direct access, both for read and write operations, to the
Timer/Counter unit 8-bit counter. Writing to the TCNTn Register blocks (removes) the Compare
Match on the following timer clock. Modifying the counter (TCNTn) while the counter is running,
introduces a risk of missing a Compare Match between TCNTn and the OCRnx Registers.
The Output Compare Register A contains an 8-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnA pin.
The Output Compare Register B contains an 8-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnB pin.
Bit
0x2D (0x4D)
Read/Write
Initial Value
Bit
0x36 (0x56)
Read/Write
Initial Value
Bit
0x2C (0x4C)
Read/Write
Initial Value
Bit
0x3C (0x5C)
Read/Write
Initial Value
Bit
0x2B (0x4B)
Read/Write
Initial Value
Bit
0x39 (0x59)
Read/Write
Initial Value
R/W
R/W
R/W
R/W
R/W
R
7
–
0
7
0
7
0
7
0
7
0
7
0
R/W
R/W
R/W
R/W
R/W
R
6
–
0
6
0
6
0
6
0
6
0
6
0
R/W
R/W
R/W
R/W
R/W
R
5
–
0
5
0
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
R/W
R
4
–
0
4
0
4
0
4
0
4
0
4
0
OCR0A[7:0]
OCR1A[7:0]
OCR0B[7:0]
OCR1B[7:0]
TCNT1[7:0]
R/W
R/W
R/W
R/W
R/W
R
3
–
0
3
0
3
0
3
0
3
0
3
0
OCIE0B
R/W
R/W
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
2
0
2
0
OCIE0A
R/W
R/W
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
1
0
1
0
TOIE0
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
TIMSK0
OCR0A
OCR1A
OCR0B
OCR1B
TCNT1
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