ATtiny13A datasheet(75/174 Pages) ATMEL

75 / 174 page

8126D–AVR–11/09

ATtiny13A

11.9.4

OCR0A – Output Compare Register A

The Output Compare Register A contains an 8-bit value that is continuously compared with the

counter value (TCNT0). A match can be used to generate an Output Compare interrupt, or to

generate a waveform output on the OC0A pin.

11.9.5

OCR0B – Output Compare Register B

The Output Compare Register B contains an 8-bit value that is continuously compared with the

counter value (TCNT0). A match can be used to generate an Output Compare interrupt, or to

generate a waveform output on the OC0B pin.

11.9.6

TIMSK0 – Timer/Counter Interrupt Mask Register

• Bits 7:4, 0 – Res: Reserved Bits

These bits are reserved bits in the ATtiny13A and will always read as zero.

• Bit 3 – OCIE0B: Timer/Counter Output Compare Match B Interrupt Enable

When the OCIE0B bit is written to one, and the I-bit in the Status Register is set, the

Timer/Counter Compare Match B interrupt is enabled. The corresponding interrupt is executed if

a Compare Match in Timer/Counter occurs, i.e., when the OCF0B bit is set in the Timer/Counter

Interrupt Flag Register – TIFR0.

• Bit 2 – OCIE0A: Timer/Counter0 Output Compare Match A Interrupt Enable

When the OCIE0A bit is written to one, and the I-bit in the Status Register is set, the

Timer/Counter0 Compare Match A interrupt is enabled. The corresponding interrupt is executed

if a Compare Match in Timer/Counter0 occurs, i.e., when the OCF0A bit is set in the

Timer/Counter 0 Interrupt Flag Register – TIFR0.

• Bit 1 – TOIE0: Timer/Counter0 Overflow Interrupt Enable

When the TOIE0 bit is written to one, and the I-bit in the Status Register is set, the

Timer/Counter0 Overflow interrupt is enabled. The corresponding interrupt is executed if an

overflow in Timer/Counter0 occurs, i.e., when the TOV0 bit is set in the Timer/Counter 0 Inter-

rupt Flag Register – TIFR0.

Bit

65432

0x36

OCR0A[7:0]

OCR0A

Read/Write

R/W

Initial Value

00000

Bit

65432

0x29

OCR0B[7:0]

OCR0B

Read/Write

R/W

Initial Value

00000

Bit

7654

0x39

––––

OCIE0B

OCIE0A

TOIE0

–

TIMSK0

Read/Write

RRRR

R/W

Initial Value

0000

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