HD6413308 Hitachi Semiconductor, HD6413308 Datasheet - Page 185

• Manufacturer Part Number: HD6413308
• Description: Hitachi Single-Chip MicroComputer
• Manufacturer: Hitachi Semiconductor

8.1 Overview
The H8/330 has an on-chip pulse-width modulation (PWM) timer module with two independent
channels (PWM0 and PWM1). Both channels are functionally identical. Each PWM channel
generates a rectangular output pulse with a duty factor of 0 to 100%. The duty factor is specified in
an 8-bit duty register (DTR).
8.1.1 Features
The PWM timer module has the following features:
• Selection of eight clock sources
• Duty factors from 0 to 100% with 1/250 resolution
• Output with positive or negative logic and software enable/disable control
8.1.2 Block Diagram
Figure 8-1 shows a block diagram of one PWM timer channel.
Pulse
TCR:
DTR:
TCNT:
Output
control
Timer Control Register (8 bits)
Duty Register (8 bits)
Timer Counter (8 bits)
Figure 8-1. Block Diagram of PWM Timer
Section 8. PWM Timers
Compare-match
Clock
171
Comparator
TCNT
DTR
TCR
Clock
select
Internal clock sources
Ø/2
Ø/8
Ø/32
Ø/128
Ø/256
Ø/1024
Ø/2048
Ø/4096
Internal
data bus