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ATmega16A Datasheet(PDF) 115 Page - ATMEL Corporation |
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ATmega16A Datasheet(HTML) 115 Page - ATMEL Corporation |
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115 / 352 page  115 8154B–AVR–07/09 ATmega16A 16.11.7 TIMSK – Timer/Counter Interrupt Mask Register (1) Note: 1. This register contains interrupt control bits for several Timer/Counters, but only Timer1 bits are described in this section. The remaining bits are described in their respective timer sections. • Bit 5 – TICIE1: Timer/Counter1, Input Capture Interrupt Enable When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally enabled), the Timer/Counter1 Input Capture Interrupt is enabled. The corresponding Interrupt Vector (See “Interrupts” on page 44.) is executed when the ICF1 Flag, located in TIFR, is set. • Bit 4 – OCIE1A: Timer/Counter1, Output Compare A Match Interrupt Enable When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally enabled), the Timer/Counter1 Output Compare A match interrupt is enabled. The corresponding Interrupt Vector (See “Interrupts” on page 44.) is executed when the OCF1A Flag, located in TIFR, is set. • Bit 3 – OCIE1B: Timer/Counter1, Output Compare B Match Interrupt Enable When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally enabled), the Timer/Counter1 Output Compare B match interrupt is enabled. The corresponding Interrupt Vector (See “Interrupts” on page 44.) is executed when the OCF1B Flag, located in TIFR, is set. • Bit 2 – TOIE1: Timer/Counter1, Overflow Interrupt Enable When this bit is written to one, and the I-flag in the Status Register is set (interrupts globally enabled), the Timer/Counter1 Overflow Interrupt is enabled. The corresponding Interrupt Vector (See “Interrupts” on page 44.) is executed when the TOV1 Flag, located in TIFR, is set. 16.11.8 TIFR – Timer/Counter Interrupt Flag Register Note: This register contains flag bits for several Timer/Counters, but only Timer1 bits are described in this section. The remaining bits are described in their respective timer sections. • Bit 5 – ICF1: Timer/Counter1, Input Capture Flag This flag is set when a capture event occurs on the ICP1 pin. When the Input Capture Register (ICR1) is set by the WGM13:0 to be used as the TOP value, the ICF1 Flag is set when the coun- ter reaches the TOP value. ICF1 is automatically cleared when the Input Capture Interrupt Vector is executed. Alternatively, ICF1 can be cleared by writing a logic one to its bit location. • Bit 4 – OCF1A: Timer/Counter1, Output Compare A Match Flag This flag is set in the timer clock cycle after the counter (TCNT1) value matches the Output Compare Register A (OCR1A). Bit 7 65 4 3 210 OCIE2 TOIE2 TICIE1 OCIE1A OCIE1B TOIE1 OCIE0 TOIE0 TIMSK Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 765 4321 0 OCF2 TOV2 ICF1 OCF1A OCF1B TOV1 OCF0 TOV0 TIFR Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 000 0000 0 |
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