h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 601

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Table 20.2 Crystal Resonator Characteristics
20.2.2
Circuit Configuration: An external clock signal can be input as shown in the examples in figure
20.4. If the XTAL pin is left open, ensure that stray capacitance does not exceed 10 pF. When
complementary clock is input to the XTAL pin, the external clock input should be fixed high in
standby mode.
Frequency (MHz)
R
C
S
0
max (pF)
max (Ω)
External Clock Input
EXTAL
XTAL
EXTAL
XTAL
Figure 20.4 External Clock Input (Examples)
4
120
7
(b) Complementary clock input at XTAL pin
8
80
7
(a) XTAL pin left open
Open
10
70
7
External clock input
External clock input
Rev. 2.00 Dec. 05, 2005 Page 563 of 724
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Section 20 Clock Pulse Generator
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REJ09B0200-0200
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