R01UH0823EJ0100 Rev.1.00 Page 171 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
Table 9.2 lists the I/O pins of the clock generation circuit.
Table 9.2 I/O Pins of Clock Generation Circuit
Pin Name I/O Description
XTAL Output These pins are used to connect a crystal. The EXTAL pin can also be used to input an
external clock. For details, refer to section 9.3.2, External Clock Input.
EXTAL Input
XCIN Input These pins are used to connect a 32.768-kHz crystal.
XCOUT Output
CLKOUT Output Clock output pin
XTAL1_RF Input Connect a 32-MHz oscillator.
XTAL2_RF Output
CLKOUT_RF Output Bluetooth-dedicated clock output pin