Renesas RL78 Series User Manual page 791

RL78/G1D
26.3.3 Port pins
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 V
26.3.4 REGC pin
Connect the REGC pin to GND via a capacitor (0.47 to 1 µF) in the same manner as during normal operation. Also,
use a capacitor with good characteristics, since it is used to stabilize internal voltage.
Remark In the flash memory programming mode, the high-speed on-chip oscillator clock (f
26.3.5 X1 and X2 pins
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
26.3.6 Power supply
To use the supply voltage output of the flash memory programmer, connect the V
programmer, and the V
SS
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
monitor function with the flash memory programmer.
R01UH0515EJ0120 Rev.1.20
Dec 16, 2016
pin to GND of the flash memory programmer.
and V pins to V
DD SS
or to V via a resistor.
DD SS
and GND of the flash memory programmer to use the power
DD
CHAPTER 26 FLASH MEMORY
) is used.
IH
) is used.
IH
pin to V of the flash memory
DD DD
770