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HCS08 bảng dữ liệu(PDF) 146 Page - NXP Semiconductors |
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HCS08 bảng dữ liệu(HTML) 146 Page - NXP Semiconductors |
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146 / 198 page ![]() Timer/Pulse-Width Modulator (S08TPMV2) MC9S08QD4 Series MCU Data Sheet, Rev. 6 146 Freescale Semiconductor Figure 11-2. TPM Block Diagram The central component of the TPM is the 16-bit counter that can operate as a free-running counter, a modulo counter, or an up-/down-counter when the TPM is configured for center-aligned PWM. The TPM counter (when operating in normal up-counting mode) provides the timing reference for the input capture, output compare, and edge-aligned PWM functions. The timer counter modulo registers, TPMxMODH:TPMxMODL, control the modulo value of the counter. (The values 0x0000 or 0xFFFF effectively make the counter free running.) Software can read the counter value at any time without affecting the counting sequence. Any write to either byte of the TPMxCNT counter resets the counter regardless of the data value written. PRESCALE AND SELECT 16-BIT COMPARATOR MAIN 16-BIT COUNTER 16-BIT COMPARATOR 16-BIT LATCH PORT 16-BIT COMPARATOR 16-BIT LATCH CHANNEL 0 CHANNEL 1 LOGIC INTERRUPT PORT LOGIC 16-BIT COMPARATOR 16-BIT LATCH CHANNEL n PORT LOGIC COUNTER RESET DIVIDE BY CLOCK SOURCE OFF, BUS, XCLK, EXT BUSCLK XCLK SELECT SYNC INTERRUPT INTERRUPT INTERRUPT 1, 2, 4, 8, 16, 32, 64, or 128 LOGIC LOGIC LOGIC LOGIC CLKSA CLKSB PS2 PS1 PS0 CPWMS TOIE TOF ELS0A CH0F ELS0B ELS1B ELS1A ELSnB ELSnA CH1F CHnF CH0IE CH1IE CHnIE MS1B MS0B MSnB MS0A MS1A MSnA TPMxMODH:TPMxMO TPMxC0VH:TPMxC0VL TPMxC1VH:TPMxC1VL TPMxCnVH:TPMxCnVL TPMxCHn TPMxCH1 TPMxCH0 TPMxCLK |
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