Datasheet

RL78/L12 CHAPTER 26 FLASH MEMORY
R01UH0330EJ0200 Rev.2.00 816
Dec 13, 2013
There are two flash memory programming modes: wide voltage mode and full speed mode. The supply voltage value
applied to the microcontroller during write operations and the setting information of the user option byte for setting of the
flash memory programming mode determine which mode is selected.
When a dedicated flash memory programmer is used for serial programming, setting the voltage on GUI selects the
mode automatically.
Table 26-5. Programming Modes and Voltages at Which Data Can Be Written, Erased, or Verified
Power Supply Voltage (VDD) User Option Byte Setting for Switching to Flash Memory
Programming Mode
Flash Programming Mode
Flash Operation Mode Operating Frequency
2.7 V ≤ VDD ≤ 5.5 V Blank state Full speed mode
HS (high speed main) mode 1 MHz to 32 MHz Full speed mode
LS (low speed main) mode 1 MHz to 8 MHz Wide voltage mode
LV (low voltage main) mode 1 MHz to 4 MHz Wide voltage mode
2.4 V ≤ VDD < 2.7 V Blank state Full speed mode
HS (high speed main) mode 1 MHz to 16 MHz Full speed mode
LS (low speed main) mode 1 MHz to 8 MHz Wide voltage mode
LV (low voltage main) mode 1 MHz to 4 MHz Wide voltage mode
1.8 V ≤ VDD < 2.4 V Blank state Wide voltage mode
LS (low speed main) mode 1 MHz to 8 MHz Wide voltage mode
LV (low voltage main) mode 1 MHz to 4 MHz Wide voltage mode
Remarks 1. Using both the wide voltage mode and full speed mode imposes no restrictions on writing, erasing, or
verification.
2. For details about communication commands, see 26.4.4 Communication commands.