Renesas rl78 User Manual

 

RL78/G1A 

CHAPTER  25   FLASH  MEMORY 

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. 

 

<R> 

User Option Byte Setting for Switching to Flash Memory 

Programming Mode 

Power Supply Voltage 

(V

DD

) 

Flash Operation Mode 

Operating Frequency 

Flash Programming Mode 

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 

2.7 V 

≤ V

DD

 

≤ 3.6 V 

LV (low voltage main) mode 

1 MHz to 4 MHz 

Wide voltage mode 

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 

2.4 V 

≤ V

DD

 < 2.7 V 

LV (low voltage main) mode 

1 MHz to 4 MHz 

Wide voltage mode 

Blank state 

 

Wide voltage mode 

LS (low speed main) mode 

1 MHz to 8 MHz 

Wide voltage mode 

1.8 V 

≤ V

DD

 < 2.4 V 

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 25.4.4  Communication commands. 

 

R01UH0305EJ0200  Rev.2.00 

 

 

811  

Jul 04, 2013