Renesas rl78 User Manual

 

RL78/G1A 

CHAPTER  25   FLASH  MEMORY 

When the flash memory programming mode is set, all the pins not used for flash memory programming enter the same 

status as that immediately after reset.  If external devices connected to the ports do not recognize the port status 

immediately after reset, the port pin must be connected to either V

DD 

or EV

DD0

, or V

SS 

or EV

SS0

, via a resistor. 

 

Connect the REGC pin to GND via a capacitor having excellent characteristics (0.47 to 1 

μ

F) in the same manner as 

during normal operation.  Also, use a capacitor with good characteristics, since it is used to stabilize internal voltage. 

<R> 

 

Connect X1 and X2 in the same status as in the normal operation mode. 

 

Remark  In the flash memory programming mode, the high-speed on-chip oscillator clock (f

IH

) is used. 

 

To use the supply voltage output of the flash memory programmer, connect the V

DD

 pin to V

DD

 of the flash memory 

programmer, and the V

SS

 pin to GND of the flash memory programmer. 

To use the on-board supply voltage, connect in compliance with the normal operation mode.  

However, when writing to the flash memory by using the flash memory programmer and using the on-board supply 

voltage, be sure to connect the V

DD

 and V

SS

 pins to V

DD

 and GND of the flash memory programmer to use the power 

monitor function with the flash memory programmer. 

 

 

R01UH0305EJ0200  Rev.2.00 

 

 

808  

Jul 04, 2013