HD6433832S Datasheet, PDF (312/560 Pages) Renesas Technology Corp – single-chip microcomputers

Section 11 14-Bit PWM
11.1 Overview
The H8/3834 Series is provided with a 14-bit PWM (pulse width modulator) on-chip, which can
be used as a D/A converter by connecting a low-pass filter.
11.1.1 Features
Features of the 14-bit PWM are as follows.
• Choice of two conversion periods
A conversion period of 3,268/φ, with a minimum modulation width of 2/φ (PWCR0 = 1), or a
conversion period of 16,384/φ, with a minimum modulation width of 1/φ (PWCR0 = 0), can be
chosen.
• Pulse division method for less ripple
11.1.2 Block Diagram
Figure 11.1 shows a block diagram of the 14-bit PWM.
PWDRL
PWDRU
φ /2
φ /4
PWM
PWM
waveform
generator
PWCR
Notation:
PWDRL: PWM data register L
PWDRU: PWM data register U
PWCR: PWM control register
Figure 11.1 Block Diagram of the 14 bit PWM
297