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HD64F2149YV データシート(PDF) 321 Page - Renesas Technology Corp |
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HD64F2149YV データシート(HTML) 321 Page - Renesas Technology Corp |
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321 / 1075 page ![]() Section 10 14-Bit PWM Timer Rev. 3.00 Jan 18, 2006 page 293 of 1044 REJ09B0280-0300 Section 10 14-Bit PWM Timer 10.1 Overview The H8S/2169 or H8S/2149 has an on-chip 14-bit pulse-width modulator (PWM) with two output channels. Each channel can be connected to an external low-pass filter to operate as a 14-bit D/A converter. Both channels share the same counter (DACNT) and control register (DACR). 10.1.1 Features The features of the 14-bit PWM (D/A) are listed below. • The pulse is subdivided into multiple base cycles to reduce ripple. • Two resolution settings and two base cycle settings are available The resolution can be set equal to one or two system clock cycles. The base cycle can be set equal to T × 64 or T × 256, where T is the resolution. • Four operating rates The two resolution settings and two base cycle settings combine to give a selection of four operating rates. |
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