Renesas RL78/G10 User Manual

RL78/G10 CHAPTER 19 OPTION BYTE
R01UH0384EJ0311 Rev. 3.11 544
Dec 22, 2016
CHAPTER 19 OPTION BYTE
19.1 Functions of Option Bytes
Addresses 000C0H to 000C3H of the flash memory of the RL78/G10 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.
The bits to which no function is allocated must be used with their initial value.
Caution The option bytes should always be set regardless of whether each function is used.
19.1.1 User option byte (000C0H to 000C2H)
(1) 000C0H
 Operation of watchdog timer
• Counter operation is enabled or disabled.
• Operation is stopped or enabled in the HALT or STOP mode.
 Time setting of watchdog timer
• Setting of overflow time of watchdog timer
• Setting of interval interrupt time of watchdog timer
(2) 000C1H
 Setting of SPOR detection level (V
SPOR)
 Controlling of P125/KR1/RESET pin
• P125/KR1 or RESET
(3) 000C2H
 Setting of the frequency of the high-speed on-chip oscillator
• Select from 1.25 to 20 MHz.
19.1.2 On-chip debug option byte (000C3H)
 Control of on-chip debug operation
• On-chip debug operation is disabled or enabled.

Renesas RL78/G10 Specifications

General

Brand	Renesas
Model	RL78/G10
Category	Motherboard
Language	English