Section 11 14-Bit Pwm; Overview; Features; Block Diagram - Renesas H8 Series Hardware Manual

11.1

Overview

The H8/3644 Group 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 32,768/φ, with a minimum modulation width of 2/φ or a conversion
period of 16,384/φ, with a minimum modulation width of 1/φ 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.
φ/2
φ/4
PWM
Legend:
PWDRL:
PWDRU:
PWCR:

Section 11 14-Bit PWM

PWM
waveform
generator
PWM data register L
PWM data register U
PWM control register
Figure 11.1 Block Diagram of the 14-Bit PWM
Section 11 14-Bit PWM
PWDRL
PWDRU
PWCR
Rev. 6.00 Sep 12, 2006 page 341 of 526
REJ09B0326-0600