R01UH0823EJ0100 Rev.1.00 Page 169 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
Note 1. The maximum operating frequency in high-speed operating mode. For the maximum operating frequency in the other operating
modes, refer to section 11.2.6, Operating Power Control Register (OPCCR).
Note 2. When oscillating USB-dedicated PLL at 48 MHz and the PLL at 54 MHz, the frequency of the main clock oscillator should be set
to 4, 6, 8, or 12 MHz.
Note 3. The PLL and USB-dedicated PLL can be used when the external voltage (VCC) is 2.4 V or above.
High-speed on-chip oscillator
(HOCO)
Oscillation frequency: 32 and 54 MHz
Low-speed on-chip oscillator
(LOCO)
Oscillation frequency: 4 MHz
IWDT-dedicated on-chip oscillator Oscillation frequency: 15 kHz
Bluetooth-dedicated clock
oscillator
Frequency of oscillation: 32 MHz
Connectable resonator: Crystal
Connection pin: XTAL1_RF, and XTAL2_RF
Bluetooth-dedicated low-speed
on-chip oscillator
Frequency of oscillation: 32.768 kHz
Table 9.1 Specifications of Clock Generation Circuit (2/2)
Item Specification
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