Renesas H8S/2268 Series, Supplementary Information, Page: 19 / 37

3
In the E6000, the clock can be selected by using the Configuration window or the Clock
command.
Table 1.4 Clock Selections
Clock Command
Parameter Configuration
Window Setting
Notes
Main clock Subclock Main clock Subclock
32 32 kHz internal clock 10
t
10MHz internal clock
Target clock
Default
32 32 kHz internal clock 20
t
20 MHz internal clock
Target clock
t t Target Target clock
t2 t Target/2 Target clock
NOTE
The system clock (
φ
) frequency is the same clock
frequency input to the XTAL and EXTAL when external clock
t is specified. For example, when a 20-MHz crystal
oscillator is connected to the XTAL and EXTAL of the user
system, the system clock (
φ
) frequency is 20 MHz. When
external clock t2 is specified, the system clock (
φ
) frequency
is 1/2 of the clock frequency input to the XTAL and EXTAL.
The frequency of the E6000 internal clock specified with
the HDI CLOCK command is applied to the system clock (
φ
).