Renesas RX Series User Manual

R01UH0823EJ0100 Rev.1.00 Page 191 of 1823
Jul 31, 2019
RX23W Group 9. Clock Generation Circuit
9.2.18 Main Clock Oscillator Forced Oscillation Control Register (MOFCR)
Note: Set the PRCR.PRC1 bit to 1 (write enabled) before rewriting this register.
The EXTAL/XTAL pin is also used as a port. In the initial setting state, the pin is set as a port.
MODRV21 Bit (Main Clock Oscillator Drive Capability Switch)
These bits select the drive capability of the main clock oscillator.
MOSEL Bit (Main Clock Oscillator Switch)
This bit selects the oscillation source of the main clock oscillator.
Address(es): 0008 C293h
b7 b6 b5 b4 b3 b2 b1 b0
—MOSEL
MODR
V21
—————
Value after reset:
00000000
Bit Symbol Bit Name Description R/W
b4 to b0 — Reserved These bits are read as 0. The write value should be 0. R/W
b5 MODRV21 Main Clock Oscillator Drive
Capability Switch
VCC
 2.4 V
0: 1 MHz or higher and lower than 10 MHz
1: 10 MHz to 20 MHz
VCC < 2.4 V
0: 1 MHz to 8 MHz
1: Setting prohibited
R/W
b6 MOSEL Main Clock Oscillator Switch 0: Resonator
1: External oscillator input
R/W
b7 — Reserved This bit is read as 0. The write value should be 0. R/W

Renesas RX Series Specifications

General

Brand	Renesas
Model	RX Series
Category	Microcontrollers
Language	English