Renesas RL78 Series User Manual page 794

RL78/G1D
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
(V )
DD
2.7 V ≤ V ≤ 3.6 V
DD
2.4 V ≤ V < 2.7 V
DD
1.8 V ≤ V < 2.4 V
DD
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.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
User Option Byte Setting for Switching to Flash Memory
Programming Mode
Flash Operation Mode
Blank state
HS (high speed main) mode
LS (low speed main) mode
LV (low voltage main) mode
Blank state
HS (high speed main) mode
LS (low speed main) mode
LV (low voltage main) mode
Blank state
LS (low speed main) mode
LV (low voltage main) mode
CHAPTER 26 FLASH MEMORY
Flash Programming Mode
Operating Frequency
1 MHz to 32 MHz
1 MHz to 8 MHz
1 MHz to 4 MHz
1 MHz to 16 MHz
1 MHz to 8 MHz
1 MHz to 4 MHz
1 MHz to 8 MHz
1 MHz to 4 MHz
Full speed mode
Full speed mode
Wide voltage mode
Wide voltage mode
Full speed mode
Full speed mode
Wide voltage mode
Wide voltage mode
Wide voltage mode
Wide voltage mode
Wide voltage mode
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