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HC705V8GRS/D bảng dữ liệu(PDF) 89 Page - NXP Semiconductors |
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HC705V8GRS/D bảng dữ liệu(HTML) 89 Page - NXP Semiconductors |
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89 / 172 page ![]() SECTION 11: 16-BIT TIMER Page 78 MC68HC705V8 Specification Rev. 2.1 NOTE: The Input Capture pin (TCAP) and the Output Compare pin (TCMP) are shared with PB7 and PB6 respectively. The timer’s TCAP input is always connected to PB7. PB6 is the timer’s TCMP pin if the OCE bit in the MISCELLANEOUS control register is set. See 7.2.2 OCE - Output compare enable. 11.4 TIMER CONTROL REGISTER (TCR) - $12 The TCR is a read/write register containing six control bits. Three bits control interrupts associated with the timer status register flags ICF, OCF and TOF. Figure 11-3: Timer Control Register - $12 11.4.1 ICIE - Input Capture Interrupt Enable 1 - Interrupt enabled 0 - Interrupt disabled 11.4.2 OCIE - Output Compare Interrupt Enable 1 - Interrupt enabled 0 - Interrupt disabled 11.4.3 TOIE - Timer Overflow Interrupt Enable 1 - Interrupt enabled 0 - Interrupt disabled 11.4.4 TON - Timer On When disabled, the timer is initialized to the reset condition. 1 - Timer enabled 0 - Timer disabled 11.4.5 IEDG - Input Edge Value of input edge determines which level transition on TCAP pin will trigger free- running counter transfer to the input capture register. Reset clears this bit. 1 - Positive edge 0 - Negative edge ICIE OCIE TOIE 0 0 TON IEDG OLVL RESET $12 00 0 0 0 0 00 Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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