Usage Of The Clock Pins; In The Case Of Inputting An External Clock - Renesas RZ/A Series User Manual

RZ/A1L Group, RZ/A1LU Group, RZ/A1LC Group
6.6

Usage of the Clock Pins

For the connection of a crystal resonator or the input of a clock signal, this LSI circuit has the pins listed in Table 6.8.
With regard to these pins, take care on the following points. Furthermore, Xin pin and Xout pin are used in this section to
refer to the pins listed in the table.
Table 6.8 Clock Pins
Xin Pins
(Used for Connection of a Crystal Resonator and Input of
External Clock Signals)
EXTAL
USB_X1
AUDIO_X1
RTC_X1
6.6.1

In the Case of Inputting an External Clock

An example of the connection of an external clock is shown in Figure 6.2. In cases where the Xout pin is left open state,
take the parasitic capacitance as less than 10 pF.
Figure 6.2 Example of the Connection of an External Clock
R01UH0437EJ0600 Rev.6.00
Jan 29, 2021
External clock input
Open state
Xout Pins
(Used for Connection of a Crystal Resonator)
XTAL
USB_X2
AUDIO_X2
RTC_X2
This LSI
Xin
Xout
6. Clock Pulse Generator
6-10