Section 19 8-Bit Pwm; Overview; Features; Block Diagram - Renesas Hitachi H8S/2194 Series Hardware Manual

19.1

Overview

The 8-bit PWM incorporates 4 channels of the duty control method. Its outputs can be used to
control a reel motor or loading motor.
19.1.1

Features

• Conversion period: 256-state
• Duty control method
19.1.2

Block Diagram

Figure 19.1 shows a block diagram of the 8-bit PWM (1 channel).
PWMn
[Legend]
PWRn : 8-bit PWM data register n
PW8CR : 8-bit PWM control register
PWMn : 8-bit PWM square-wave output pin n
OVF : Overflow signal from FRC lower 8-bit

Section 19 8-Bit PWM

Internal data bus
PW8CR
Polarity
Q
specification
Free-running counter (FRC)
Figure 19.1 Block Diagram of 8-Bit PWM
Match signal
R
S
OVF
7
2
Rev. 2.0, 11/00, page 405 of 1037
PWRn
Comparator
0
2
(n=3 to 0)