Datasheet

RL78/L12 CHAPTER 25 OPTION BYTE
R01UH0330EJ0200 Rev.2.00 802
Dec 13, 2013
Figure 25-3. Format of Option Byte (000C2H)
Address: 000C2H
7 6 5 4 3 2 1 0
CMODE1 CMODE0 1 0 FRQSEL3 FRQSEL2 FRQSEL1 FRQSEL0
CMODE1 CMODE0 Setting of flash operation mode
Operating
frequency range
Operating voltage
range
0 0
LV (low voltage main) mode 1 to 4 MHz 1.6 to 5.5 V
1 0
LS (low speed main) mode 1 to 8 MHz 1.8 to 5.5 V
1 1
HS (high speed main) mode 1 to 16 MHz 2.4 to 5.5 V
1 to 24 MHz 2.7 to 5.5 V
Other than above
Setting prohibited
FRQSEL3 FRQSEL2 FRQSEL1 FRQSEL0 Frequency of the high-speed on-chip oscillator
0 0 0 0
24 MHz
1 0 0 1
16 MHz
0 0 0 1
12 MHz
1 0 1 0
8 MHz
0 0 1 0
6 MHz
1 0 1 1
4 MHz
0 0 1 1
3 MHz
1 1 0 0
2 MHz
1 1 0 1
1 MHz
Other than above Setting prohibited
Cautions 1. Be sure to set 10B to bits 5 and 4.
2. The ranges of operating frequency and operating voltage vary depending on the flash
operation mode. For details, see 30.4 or 31.4 AC Characteristics.
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