HD6413003RF Datasheet, PDF (523/715 Pages) Renesas Technology Corp – Microcontroller (MCU)

Section 16 Clock Pulse Generator
16.1 Overview
The H8/3003 has a built-in clock pulse generator (CPG) that generates the system clock (ø) and
other internal clock signals (ø/2 to ø/4096).
The H8/3003 is available in a clock-halving version and a 1:1 version, which have different clock
pulse generator configurations. The clock pulse generator of the clock-halving version consists of
an oscillator circuit, a system clock divider, and prescalers for the on-chip supporting modules.
The clock pulse generator of the 1:1 version consists of an oscillator circuit, a duty adjustment
circuit, and the prescalers.
16.1.1 Block Diagram
Figure 16-1 shows block diagrams of the clock pulse generator.
XTAL
EXTAL
Oscillator
Frequency
divider
(1/2)
CPG
Prescalers
XTAL
EXTAL
ø
ø/2 to ø/4096
a. Clock pulse generator of clock-halving version
CPG
Oscillator
Duty
adjustment
circuit
Prescalers
ø
b. Clock pulse generator of 1:1 version
ø/2 to ø/4096
Figure 16-1 Block Diagram of Clock Pulse Generator
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