HD6432160 RENESAS [Renesas Technology Corp], HD6432160 Datasheet - Page 655

• Manufacturer Part Number: HD6432160
• Description: Hitachi 16-Bit Single-Chip Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

25.7
The clock select circuit selects the system clock that is used in this LSI.
A clock generated by an oscillator to which the EXTAL and XTAL pins are input is selected as a
system clock when returning from high-speed mode, medium-speed mode, sleep mode, reset state,
or standby mode.
A subclock input from the EXCL pin is selected as a system clock in subactive mode, subsleep
mode, or watch mode. At this time, modules such as the CPU, TMR_0, TMR_1, WDT_0,
WDT_1, ports, and interrupt controller and their functions operate depending on the øSUB. The
count clock and sampling clock for each timer are divided øSUB clocks.
25.8
The X1 and X2 pins should be open as shown in figure 25.8.
Clock Select Circuit
Processing for X1 and X2 Pins
Figure 25.8 Processing for X1 and X2 Pins
X1
X2
Open
Open
Rev. 2.0, 08/02, page 615 of 788