HD64F3644PV Datasheet, PDF (363/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 11 14-Bit PWM
Section 11 14-Bit PWM
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.
PWDRL
PWDRU
φ/2
PWM
waveform
φ/4
generator
PWM
PWCR
Legend:
PWDRL: PWM data register L
PWDRU: PWM data register U
PWCR: PWM control register
Figure 11.1 Block Diagram of the 14-Bit PWM
Rev. 6.00 Sep 12, 2006 page 341 of 526
REJ09B0326-0600