Renesas RL78 Series User Manual

RL78/F13, F14 CHAPTER 29 OPTION BYTE
R01UH0368EJ0210 Rev.2.10 1615
Dec 10, 2015
CHAPTER 29 OPTION BYTE
29.1 Functions of Option Bytes
Addresses 000C0H to 000C3H of the flash memory of the RL78/F13 and RL78/F14 form an option byte area.
Option bytes consist of user option byte (000C0H to 000C2H) and on-chip debug option byte (000C3H).
Upon power application or resetting and starting, an option byte is automatically referenced and a specified function is
set. When using the product, be sure to set the following functions by using the option bytes.
To use the boot swap operation during self programming, 000C0H to 000C3H are replaced by 020C0H to 020C3H.
Therefore, set the same values as 000C0H to 000C3H to 020C0H to 020C3H.
29.1.1 User option byte (000C0H to 000C2H/020C0H to 020C2H)
(1) 000C0H/020C0H
 Operation of watchdog timer
 Operation is stopped or enabled in the HALT, STOP, or SNOOZE mode.
 Setting of interval time of watchdog timer
 Operation of watchdog timer
 Operation is stopped or enabled.
 Setting of window open period of watchdog timer
 Setting of interval interrupt of watchdog timer
 Used or not used
Caution Set the same value as 000C0H to 020C0H when the boot swap operation is used because 000C0H
is replaced by 020C0H.
(2) 000C1H/020C1H
 Setting of LVD operation mode
 Interrupt & reset mode
 Reset mode
 Interrupt mode
 Setting of LVD detection level (V
LVDH, VLVDL, VLVD)
 Operation of clock monitor
 Operation is stopped or enabled.
Caution Set the same value as 000C1H to 020C1H when the boot swap operation is used because 000C1H
is replaced by 020C1H.

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