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AT90USB646 Datasheet(PDF) 147 Page - ATMEL Corporation |
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AT90USB646 Datasheet(HTML) 147 Page - ATMEL Corporation |
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147 / 434 page  147 7593A–AVR–02/06 AT90USB64/128 14.10.13 Output Compare Register 3 B – OCR3BH and OCR3BL 14.10.14 Output Compare Register 3 C – OCR3CH and OCR3CL 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 120. 14.10.15 Input Capture Register 1 – ICR1H and ICR1L 14.10.16 Input Capture Register 3 – ICR3H and ICR3L 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 120. 14.10.17 Timer/Counter1 Interrupt Mask Register – TIMSK1 Bit 7654 32 1 0 OCR3B[15:8] OCR3BH OCR3B[7:0] OCR3BL Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0000 00 0 0 Bit 7654 32 1 0 OCR3C[15:8] OCR3CH OCR3C[7:0] OCR3CL Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0000 00 0 0 Bit 7654 32 1 0 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 0000 00 0 0 Bit 7654 32 1 0 ICR3[15:8] ICR3H ICR3[7:0] ICR3L Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0000 00 0 0 Bit 7654 32 1 0 – –ICIE1 –OCIE1 C OCIE1B OCIE1A TOIE1 TIMSK1 Read/Write R R R/W R R/W R/W R/W R/W Initial Value 0000 00 0 0 |
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