Renesas RL78/G1P Hardware User Manual page 691

RL78/G1P
The dedicated flash memory programmer generates the following signals for the RL78/G1P. See the manual of PG-
FP6 or E1, E2, E2 Lite, E20 on-chip debugging emulator for details.
Signal Name
PG-FP6 E1, E2, E2 Lite,
E20 On-chip
Debugging
Emulator
V
CC
GND
EMV
DD
/RESET

RESET

TOOL0
SI/RxD
Note Connect REGC pin to ground via a capacitor (0.47 to 1
23.2 Serial Programming Using External Device (that Incorporates UART)
On-board data writing to the internal flash memory is possible by using the RL78/G1P and an external device (a
microcontroller or ASIC) connected to a UART.
On the development of flash memory programmer by user, refer to the RL78 Microcontrollers (RL78 Protocol A)
Programmer Edition Application Note (R01AN0815).
23.2.1 Programming environment
The environment required for writing a program to the flash memory of the RL78/G1P is illustrated below.
Processing to write data to or delete data from the RL78/G1P by using an external device is performed on-board. Off-
board writing is not possible.
R01UH0895EJ0100 Rev.1.00
Nov 29, 2019
Table 23-2. Pin Connection
Dedicated Flash Memory Programmer
I/O
V I/O
DD



Output
Output
I/O

I/O
Figure 23-3. Environment for Writing Program to Flash Memory
External device
(such as microcontroller
and ASIC)
Pin Function
V voltage generation/power monitoring
DD
Ground
Driving power for TOOL pin
Reset signal
Transmit/receive signal
Transmit/receive signal

F).
V
DD
V
SS
RESET
UART (TOOLTxD, TOOLRxD)
TOOL0
CHAPTER 23 FLASH MEMORY
RL78/G1P
Pin Name
V
DD
Note
V , REGC
SS
V
DD
RESET
TOOL0
RL78/G1P
672