HD6433682 ETC, HD6433682 Datasheet - Page 99

• Manufacturer Part Number: HD6433682
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Tiny Series
• Manufacturer: ETC

Clock oscillator circuitry (CPG: clock pulse generator) is provided on-chip, including both a
system clock pulse generator and a subclock pulse generator. The system clock pulse generator
consists of a system clock oscillator, a duty correction circuit, and system clock dividers. The
subclock pulse generator consists of a subclock oscillator circuit and a subclock divider.
Figure 5.1 shows a block diagram of the clock pulse generators.
The basic clock signals that drive the CPU and on-chip peripheral modules are ø and ø
system clock is divided by prescaler S to become a clock signal from ø/8192 to ø/2, and the
subclock is divided by prescaler W to become a clock signal from øw/128 to øw/8. Both the
system clock and subclock signals are provided to the on-chip peripheral modules.
CPG0200A_000020020200
OSC
OSC
X
X
1
2
1
2
oscillator
Subclock
oscillator
System
clock
System clock pulse generator
Subclock pulse generator
Figure 5.1 Block Diagram of Clock Pulse Generators
Section 5 Clock Pulse Generators
(f
ø
OSC
OSC
)
correction
(f
ø
W
circuit
W
Duty
)
(f
ø
OSC
OSC
)
Subclock
System
divider
divider
clock
ø
ø
ø
ø
ø
ø
ø
ø
OSC
OSC
OSC
OSC
OSC
W
W
W
/2
/4
/8
/8
/16
/32
/64
Rev. 3.00, 05/03, page 69 of 472
ø
Prescaler W
Prescaler S
(13 bits)
(5 bits)
ø
SUB
SUB
. The
ø/2
to
ø/8192
ø
to
ø
W
W
/8
/128