H8S2110B RENESAS [Renesas Technology Corp], H8S2110B Datasheet - Page 473

• Manufacturer Part Number: H8S2110B
• Description: Renesas 16-Bit Single-Chip Microcomputer Renesas H8S Family/H8S/2100 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Table 18.2 Crystal Resonator Parameters
Frequency (MHz)
R
C
18.1.2
Figure 18.4 shows a typical method of connecting an external clock signal. To leave the XTAL pin
open, incidental capacitance should be 10 pF or less.
To input an inverted clock to the XTAL pin, the external clock should be set to high in standby
mode, subactive mode, subsleep mode, and watch mode. External clock input conditions are
shown in table 18.3. The frequency of the external clock should be the same as that of the system
clock ( ).
S
0
(max) (pF)
(max) ( )
External Clock Input Method
(b) Example of external clock input when an inverted clock is input to XTAL pin
2
500
7
EXTAL
XTAL
EXTAL
XTAL
Figure 18.4 Example of External Clock Input
(a) Example of external clock input when XTAL pin left open
4
120
7
Open
Rev. 2.00 Mar 21, 2006 page 435 of 518
8
80
7
External clock input
External clock input
Section 18 Clock Pulse Generator
REJ09B0299-0200
10
70
7