Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 5 CLOCK GENERATOR
R01UH0368EJ0210 Rev.2.10 402
Dec 10, 2015
5.6 Controlling Clock
5.6.1 Example of Setting High-Speed On-Chip Oscillator
After a reset release, the CPU/peripheral hardware clock (f
CLK) always starts operating with the high-speed on-chip
oscillator clock. The frequency of the high-speed on-chip oscillator can be selected from 64, 48, 32, 24, 16, 12, 8, 4, and 1
MHz by using FRQSEL0 to FRQSEL4 of the user option byte (000C2H/020C2H). In addition, Oscillation can be changed
by the internal high-speed on-chip oscillator frequency select register (HOCODIV).
[User option byte setting]
Address: 000C2H/020C2H After reset: - (user setting value)
Option
byte
7 6 5 4 3 2 1 0
1 1
RESOUTB
0/1
FRQSEL4
0/1
FRQSEL3
0/1
FRQSEL2
0/1
FRQSEL1
0/1
FRQSEL0
0/1
FRQSEL4 FRQSEL3 FRQSEL2 FRQSEL1 FRQSEL0 Frequency of the high-speed
on-chip oscillator
fIH
1 1 0 0 0
64 MHz
1 0 0 0 0
48 MHz
0 1 0 0 0
32 MHz
0 0 0 0 0
24 MHz
0 1 0 0 1
16 MHz
0 0 0 0 1
12 MHz
0 1 0 1 0
8 MHz
0 1 0 1 1
4 MHz
0 1 1 0 1
1 MHz
Other than above Setting prohibited

Renesas RL78 Series Specifications

General

Core	RL78
CPU Clock Speed	Up to 32 MHz
Flash Memory	Up to 512 KB
RAM	Up to 32 KB
Operating Voltage	1.6 V to 5.5 V
Low Power Modes	HALT, STOP, SNOOZE
CPU Architecture	16-bit
Temperature Range	-40°C to +85°C
Package	LQFP
Timers	16-bit timers
Communication Interfaces	UART, I2C, LIN
A/D Converter	12-bit