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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/29 датащи(PDF) 128 Page - Renesas Technology Corp |
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M16C/29 датащи(HTML) 128 Page - Renesas Technology Corp |
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128 / 499 page  12. Timer A p u o r G 9 2 / C 6 1 M page 104 8 5 4 f o 7 0 0 2 , 0 3 .r a M 2 1 . 1 . v e R 2 1 1 0 - 1 0 1 0 B 9 0 J E R Figure 12.5 TA0 to TA4 Registers, TABSR Register, and UDF Register Symbol Address After Reset TA0 038716, 038616 Undefined TA1 038916, 038816 Undefined TA2 038B16, 038A16 Undefined TA3 038D16, 038C16 Undefined TA4 038F16, 038E16 Undefined b7 b0 b7 b0 (b15) (b8) Timer Ai Register (i= 0 to 4) (1) Function Setting Range Timer mode Event counter mode One-shot timer mode Mode RW WO RW RW WO WO Symbol Address After Reset TABSR 038016 0016 Count Start Flag b7 b6 b5 b4 b3 b2 b1 b0 NOTES: 1. The register must be accessed in 16 bit units. 2. If the TAi register is set to 000016, the counter does not work and timer Ai interrupt requests are not generated either. Furthermore, if “pulse output” is selected, no pulses are output from the TAiOUT pin. 3. If the TAi register is set to 000016, the pulse width modulator does not work, the output level on the TAiOUT pin remains low, and timer Ai interrupt requests are not generated either. The same applies when the 8 high-order bits of the timer TAi register are set to 000016 while operating as an 8-bit pulse width modulator. 4. Use the MOV instruction to write to the TAi register. 5. The timer counts pulses from an external device or overflows or underflows in other timers. Divide the count source by n + 1 where n = set value 000016 to FFFE16 (3, 4) 000016 to FFFF16 000016 to FFFF16 000016 to FFFF16 (2, 4) 0016 to FE16 (High-order address) 0016 to FF16 (Low-order address) (3, 4) Modify the pulse width as follows: PWM period: (28 – 1) x (m + 1)/ fj High level PWM pulse width: (m + 1)n / fj where n = high-order address set value, m = low-order address set value, fj = count source frequency Modify the pulse width as follows: PWM period: (216 – 1) / fj High level PWM pulse width: n / fj where n = set value, fj = count source frequency Divide the count source by n where n = set value and cause the timer to stop Divide the count source by FFFF16 – n + 1 where n = set value when counting up or by n + 1 when counting down(5) Pulse width modulation mode (16-bit PWM) Pulse width modulation mode (8-bit PWM) Bit Name Function Bit Symbol 0 : Stops counting 1 : Starts counting Timer B2 count start flag TB2S Timer B1 count start flag TB1S Timer B0 count start flag TB0S Timer A4 count start flag TA4S Timer A3 count start flag TA3S Timer A2 count start flag TA2S Timer A1 count start flag TA1S Timer A0 count start flag TA0S RW RW RW RW RW RW RW RW RW Symbol Address After Reset UDF 038416 0016 Up/Down Flag (1) b7 b6 b5 b4 b3 b2 b1 b0 Bit Name Function Bit Symbol 0: Down count 1: Up count TA4P TA3P TA2P Timer A4 up/down flag TA4UD Timer A3 up/down flag TA3UD Timer A2 up/down flag TA2UD Timer A1 up/down flag TA1UD Timer A0 up/down flag TA0UD RW RW RW RW RW RW WO WO WO Enabled by setting the MR2 bit in the TAiMR register to 0 (= switching source in UDF register) during event counter mode 0: two-phase pulse signal processing disabled 1: two-phase pulse signal processing enabled (2, 3) Timer A2 two-phase pulse signal processing select bit Timer A3 two-phase pulse signal processing select bit Timer A4 two-phase pulse signal processing select bit NOTES: 1. Use MOV instruction to write to this register. 2. Make sure the port direction bits for the TA2IN to TA4IN and TA2OUT to TA4OUT pins are set to 0 input mode. 3. When the two-phase pulse signal processing function is not used, set the corresponding bit to 0. |
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