Clock Input Pins; Pin Functions - Renesas R-IN32M4-CL3 User Manual

R-IN32M4-CL3 User's Manual: Board design edition
3.

Clock Input Pins

3.1

Pin Functions

This is a list of pin functions of clock input pins.
Pin Name Attribute
XT1 I/O
XT2 Input
Note
OSCTH Input
Caution: For the AC characteristics of the input clock, refer to Section 29.8.1 (1) "Input Clock" in the
"R-IN32M4-CL3 User's Manual: Hardware edition".
Note: Connection with an oscillator is recommended.
R18UZ0074EJ0100
Dec 24, 2019
Function
Connects an external oscillator.
When OSCTH = 0, this pin functions as an output pin.
In external clock input mode (OSCTH = 1), drive XT1 to the low level.
Connects an external oscillator.
In external clock input mode (OSCTH = 1), the clock signal from an external oscillator is
input via XT2.
Selects the clock oscillation source to be connected to the clock pin.
Low level: XT1 and XT2 are to be connected to a resonator.
High level: XT2 is to be connected to an oscillator.
3. Clock Input Pins
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