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AT90PWM2 Datasheet(PDF) 165 Page - ATMEL Corporation |
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AT90PWM2 Datasheet(HTML) 165 Page - ATMEL Corporation |
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165 / 365 page  165 4317K–AVR–03/2013 AT90PWM2/3/2B/3B 16.25.6 Output Compare SB Register – OCRnSBH and OCRnSBL 16.25.7 Output Compare RB Register – OCRnRBH and OCRnRBL Note : n = 0 to 2 according to PSC number. The Output Compare Registers RA, RB, SA and SB contain a 12-bit value that is continuously compared with the PSC counter value. A match can be used to generate an Output Compare interrupt, or to generate a waveform output on the associated pin. The Output Compare Registers RB contains also a 4-bit value that is used for the flank width modulation. The Output Compare Registers are 16bit and 12-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 per- formed using an 8-bit temporary high byte register (TEMP). This temporary register is shared by all the other 16-bit registers. 16.25.8 PSC 0 Configuration Register – PCNF0 16.25.9 PSC 1 Configuration Register – PCNF1 16.25.10 PSC 2 Configuration Register – PCNF2 The PSC n Configuration Register is used to configure the running mode of the PSC. • Bit 7 - PFIFTYn: PSC n Fifty Writing this bit to one, set the PSC in a fifty percent mode where only OCRnRBH/L and OCRn- SBH/L are used. They are duplicated in OCRnRAH/L and OCRnSAH/L during the update of OCRnRBH/L. This feature is useful to perform fifty percent waveforms. Bit 76543210 –––– OCRnSB[11:8] OCRnSBH OCRnSB[7:0] OCRnSBL Read/Write WWWWWWWW Initial Value 00000000 Bit 76543210 OCRnRB[15:12] OCRnRB[11:8] OCRnRBH OCRnRB[7:0] OCRnRBL Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 00000000 Bit 7 654 3 2 1 0 PFIFTY0 PALOCK0 PLOCK0 PMODE01 PMODE00 POP0 PCLKSEL0 - PCNF0 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 7 654 3 2 1 0 PFIFTY1 PALOCK1 PLOCK1 PMODE11 PMODE10 POP1 PCLKSEL1 - PCNF1 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 Bit 7 654 3 2 1 0 PFIFTY2 PALOCK2 PLOCK2 PMODE21 PMODE20 POP2 PCLKSEL2 POME2 PCNF2 Read/Write R/W R/W R/W R/W R/W R/W R/W R/W Initial Value 0 0 0 0 0 0 0 0 |
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