h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 763

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

23.1
The H8S/2169 and H8S/2149 have a built-in clock pulse generator (CPG) that generates the
system clock ( ), the bus master clock, and internal clocks.
The clock pulse generator consists of an oscillator circuit, a duty-cycle adjustment circuit, clock
selection circuit, medium-speed clock divider, bus-master clock selection circuit, subclock input
circuit, and waveform shaping circuit.
23.1.1
Figure 23.1 is a block diagram of the clock pulse generator.
EXTAL
XTAL
EXCL
Overview
Block Diagram
input circuit
Oscillator
Subclock
Figure 23.1 Block Diagram of Clock Pulse Generator
Section 23 Clock Pulse Generator
adjustment
Duty-cycle
Waveform
shaping
circuit
circuit
WDT1 count clock
SUB
selection
circuit
Clock
System clock
To
pin
Rev. 3.00 Jan 18, 2006 page 735 of 1044
Medium-speed
clock divider
Section 23 Clock Pulse Generator
Internal clock
To supporting
modules
/2 to /32
Bus-master
selection
REJ09B0280-0300
circuit
clock
Bus master clock
To CPU, DTC