HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 1027

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Table 23.2 Crystal Resonator Characteristics
Frequency (MHz)
R
C
23.2.2
An external clock signal can be input as shown in the examples in figure 23.4. If the XTAL pin is
left open, make sure that parasitic capacitance is no more than 10 pF. When the counter clock is
input to the XTAL pin, make sure that the external clock is held high in standby mode.
Table 23.3 shows the input conditions for the external clock. When an external clock is used, the
range of its frequencies is from 8 to 25 MHz.
S
0
max (pF)
max (Ω)
External Clock Input
EXTAL
EXTAL
XTAL
XTAL
Figure 23.4 External Clock Input (Examples)
8
80
7
(b) Counter clock input at XTAL pin
12
60
7
(a) XTAL pin left open
Open
Rev.7.00 Mar. 18, 2009 page 959 of 1136
16
50
7
External clock input
External clock input
Section 23 Clock Pulse Generator
20
40
7
REJ09B0109-0700
25
40
7