h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 764

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 21 Clock Pulse Generator
21.6
The bus master clock selection circuit selects the system clock (φ) or one of the medium-speed
clocks (φ/2, φ/4, or φ/8, φ/16, and φ/32) to be supplied to the bus master, according to the settings
of the SCK2 to SCK0 bits in SCKCR.
21.7
Connecting 32.768kHz Quartz Oscillator: To supply a clock to the subclock divider, connect a
32.768kHz quartz oscillator, as shown in figure 21.6. See section 21.3.1, “Notes on Board Design”
for notes on connecting quartz oscillators.
Figure 21.7 shows the equivalence circuit for a 32.768kHz oscillator.
Rev. 5.00 Sep 22, 2005 page 738 of 1136
REJ09B0257-0500
OSC1
Bus Master Clock Selection Circuit
Subclock Oscillator
Note: * C
Figure 21.6 Example Connection of 32.768kHz Quartz Oscillator
Figure 21.7 Equivalence Circuit for 32.768kHz Oscillator
OSC2
OSC1
1
and C
L
s
2
are reference values that include the wiring capacity.
C
s
C
C
1
2
C
o
C
1
=C
2
R
=15pF (typ) *
s
OSC2