h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1007

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

22B.3.2 External Clock Input
Circuit Configuration
An external clock signal can be input as shown in the examples in figure 22B-6. If the XTAL pin
is left open, make sure that stray capacitance is no more than 10 pF.
In example (b), make sure that the external clock is held high in standby mode.
In this case, the input clock frequency should be between 4 MHz and 5 MHz.
Note: * In the case of the H8S/2635 Group, do not input a complementary clock to the XTAL pin.
EXTAL
EXTAL
XTAL
XTAL
Figure 22B-6 External Clock Input (Examples)
Section 22B Clock Pulse Generator (H8S/2639 Group, H8S/2635 Group)
(b) Complementary clock input at XTAL pin *
(a) XTAL pin left open
Open
Rev. 6.00 Feb 22, 2005 page 947 of 1484
External clock input
External clock input
REJ09B0103-0600