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R01UH0823EJ0100 Rev.1.00 Page 195 of 1823

Jul 31, 2019

RX23W Group 9. Clock Generation Circuit

9.2.22 High-Speed On-Chip Oscillator Trimming Register n (HOCOTRRn) (n = 0, 3)

Note: Set the PRCR.PRC0 bit to 1 (write enabled) before rewriting this register.

Note 1. Chip-specific value

HOCOTRR0 corresponds to 32 MHz, and HOCOTRR3 corresponds to 54 MHz.

HOCOTRD[5:0] Bits (High-Speed On-Chip Oscillator Frequency Adjustment)

Set the frequency adjustment value for the high-speed on-chip oscillator.

The setting range is from 0 (00h) to 63 (3Fh) by binary numbers. The greater the set value is, the higher the frequency is.

The frequency is adjusted under certain conditions before shipment, so the value after reset varies with the chip. After a

reset, the oscillation frequency returns to the factory default.

Address(es): HOCOTRR0 0008 0068h, HOCOTRR3 0008 006Bh

b7 b6 b5 b4 b3 b2 b1 b0

— — HOCOTRD[5:0]

Value after reset:

*1 *1 *1 *1 *1 *1

Bit Symbol Bit Name Description R/W

b5 to b0 HOCOTRD[

5:0]

High-Speed On-Chip Oscillator

Frequency Adjustment

b5 b0

0 0 0 0 0 0: 0 (Frequency: Low)

0 0 0 0 0 1: 1

: :

1 1 1 1 1 0: 62

1 1 1 1 1 1: 63 (Frequency: High)

R/W

b7, b6 — Reserved These bits are read as 0. The write value should be 0. R/W

Renesas RX Series User Manual

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