Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 194 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
9.2.20 Low-Speed On-Chip Oscillator Trimming Register (LOCOTRR)
Note: Set the PRCR.PRC0 bit to 1 (write enabled) before rewriting this register.
Note 1. Chip-specific value
LOCOTRD[4:0] Bits (Low-Speed On-Chip Oscillator Frequency Adjustment)
Set the frequency adjustment value for the low-speed on-chip oscillator.
The setting range is -16 (10h) to 15 (0Fh) by two's complements. 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.
9.2.21 IWDT-Dedicated On-Chip Oscillator Trimming Register (ILOCOTRR)
Note: Set the PRCR.PRC0 bit to 1 (write enabled) before rewriting this register.
Note 1. Chip-specific value
ILOCOTRD[4:0] Bits (IWDT-Dedicated On-Chip Oscillator Frequency Adjustment)
Set the frequency adjustment value for the IWDT-dedicated on-chip oscillator.
The setting range is from 0 (00h) to 31 (1Fh) 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): 0008 0060h
b7 b6 b5 b4 b3 b2 b1 b0
— — — LOCOTRD[4:0]
Value after reset:
000
*1 *1 *1 *1 *1
Bit Symbol Bit Name Description R/W
b4 to b0 LOCOTRD[
4:0]
Low-Speed On-Chip Oscillator
Frequency Adjustment
b4 b0
1 0 0 0 0: -16 (Frequency: Low)
1 0 0 0 1: -15
: :
0 1 1 1 0: 14
0 1 1 1 1: 15 (Frequency: High)
R/W
b7 to b5 — Reserved These bits are read as 0. The write value should be 0. R/W
Address(es): 0008 0064h
b7 b6 b5 b4 b3 b2 b1 b0
— — — ILOCOTRD[4:0]
Value after reset:
000
*1 *1 *1 *1 *1
Bit Symbol Bit Name Description R/W
b4 to b0 ILOCOTRD
[4:0]
IWDT-Dedicated On-Chip
Oscillator Frequency Adjustment
b4 b0
0 0 0 0 0: 0 (Frequency: Low)
0 0 0 0 1: 1
: :
1 1 1 1 0: 30
1 1 1 1 1: 31 (Frequency: High)
R/W
b7 to b5 — Reserved These bits are read as 0. The write value should be 0. R/W

Renesas RX Series Specifications

General

Core	RXv1, RXv2, RXv3
Flash Memory	Up to 8 MB
RAM	Up to 1 MB
Operating Voltage	1.62V to 5.5V
Operating Temperature	-40°C to +85°C or +105°C
Package	BGA, LQFP
ADC Resolution	12-bit
DAC Resolution	12-bit
Communication Interfaces	SCI, SPI, I2C, USB, Ethernet, CAN
Architecture	32-bit
Security Features	Memory Protection Unit (MPU)