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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT90PWM3 датащи(PDF) 127 Page - ATMEL Corporation |
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AT90PWM3 датащи(HTML) 127 Page - ATMEL Corporation |
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127 / 361 page  127 4317J–AVR–08/10 AT90PWM2/3/2B/3B The Output Compare Registers contain a 16-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 OCnx pin. The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are written simultaneously when the CPU writes to these registers, the access is performed using an 8-bit temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit registers. See “Accessing 16-bit Registers” on page 104. 15.10.7 Input Capture Register 1 – ICR1H and ICR1L The Input Capture is updated with the counter (TCNTn) value each time an event occurs on the ICPn pin (or optionally on the Analog Comparator output for Timer/Counter1). The Input Capture can be used for defining the counter TOP value. The Input Capture Register is 16-bit in size. To ensure that both the high and low bytes are read simultaneously when the CPU accesses these registers, the access is performed using an 8-bit temporary High Byte Register (TEMP). This temporary register is shared by all the other 16-bit registers. See “Accessing 16-bit Registers” on page 104. 15.10.8 Timer/Counter1 Interrupt Mask Register – TIMSK1 • Bit 7, 6 – Res: Reserved Bits These bits are unused bits in the AT90PWM2/2B/3/3B, and will always read as zero. • Bit 5 – ICIE1: 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 “Reset and Interrupt Vectors Placement in AT90PWM2/2B/3/3B(1)” on page 57) is executed when the ICF1 Flag, located in TIFR1, is set. • Bit 4, 3 – Res: Reserved Bits These bits are unused bits in the AT90PWM2/2B/3/3B, and will always read as zero. • Bit 2 – 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 “Reset and Interrupt Vectors Placement in AT90PWM2/2B/3/3B(1)” on page 57) is executed when the OCF1B Flag, located in TIFR1, is set. • Bit 1 – 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 OCR1B[7:0] OCR1BL Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 00000000 Bit 76543210 ICR1[15:8] ICR1H ICR1[7:0] ICR1L Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 00000000 Bit 7 6 543 2 1 0 – – ICIE1 – – OCIE1B OCIE1A TOIE1 TIMSK1 Read/Write R R R/W R R R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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