upd78f0134hgka1-9et-a Renesas Electronics Corporation., upd78f0134hgka1-9et-a Datasheet - Page 119

• Manufacturer Part Number: upd78f0134hgka1-9et-a
• Description: 8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

5.4 System Clock Oscillator
5.4.1 High-speed system clock oscillator
and X2 pins.
X1 pin and input the inverse signal to the X2 pin.
5.4.2 Subsystem clock oscillator
and XT2 pins.
and the inverse signal to the XT2 pin.
The high-speed system clock oscillator oscillates with a crystal resonator or ceramic resonator connected to the X1
An external clock can be input to the high-speed system clock oscillator. In this case, input the clock signal to the
Figure 5-8 shows examples of the external circuit of the high-speed system clock oscillator.
Caution is provided on the next page.
The subsystem clock oscillator oscillates with a crystal resonator (Standard: 32.768 kHz) connected to the XT1
External clocks can be input to the subsystem clock oscillator. In this case, input the clock signal to the XT1 pin
Figure 5-9 shows examples of an external circuit of the subsystem clock oscillator.
Caution is provided on the next page.
Figure 5-8. Examples of External Circuit of High-Speed System Clock Oscillator
(a) Crystal, ceramic oscillation
Crystal resonator or
ceramic resonator
Figure 5-9. Examples of External Circuit of Subsystem Clock Oscillator
(a) Crystal oscillation
32.768
kHz
V
X1
X2
SS
CHAPTER 5 CLOCK GENERATOR
V
XT1
XT2
SS
User’s Manual U16899EJ3V0UD
External
clock
External
clock
(b) External clock
(b) External clock
X1
X2
XT1
XT2
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