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:
0
0
Bit
Symbol
Bit Name
Description
R/W
b5 to b0
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